Mixture Definition and 277 Threads

Hello, How do I calculate the following. The final temperature of a mixture of of ice and water. Where 176grams of ice at -10celsius mixes with 206 grams of water at 73.3celsius. I have tried this equation in multiple fashions and cannot seems to come to a consistent answer! Any help would be...

So this is a fairly simple conceptual question: can you estimate/compare the mean free paths for individual components of a mixture of gases? I'm primarily looking at the equation given here and the information accompanying it. Consider the case where we have several individual, separate...

Homework Statement If you have a mixture of saturated water vapor and saturated liquid water at a pressure of 5000 kPa, and you measure its specific volume to be 0.03181 m^3/kg, what is the quality of the mixture? Homework Equations Nothing is given :( From lectures I found vtot =...

[SIZE="4"]Assume we have a concentration of any specific material (in mg/M). Let's say for example: Ag (Z=47) with concentration 10 mg/M in water (H2O, Z=7.42). How can I calculate the effective atomic number (Zeff.) for the silver-water mixture if the concentration of silver was 10 mg/M for...

Homework Statement A glass mug has mass 125g empty. It contains 180g of coffee. Both are at 70 C. I add 15g of creme at 5 C. Find final temperature. Assume creme has specific heat of 2900 J/kg.C . Homework Equations Q = m C (delta)T in joules or Kcalories m = mass in kg...

Hi All, I'm trying to implement the Gaussian Mixture Model for background subtraction as described by Chris Stauffer and W.E.L Grimson in their paper "Adaptive background mixture models for real-time tracking." I'm having a little trouble with the logic in the step that updates the mean...

Hi all, I have a question here. If I have a room with size of 3m x 7m x 3.5m with equipment of heat dissipation of 4kW. A blower fan is installed in the room to draw in the ambient air into the room to reduce the room temperature. At extreme condition the ambient temperature is around 33C...

Attached is the question and my working, my answers don't match up to the given answers, but they still seem right. Can anybody see where the mistake is?

Three tablespoons of milk from a glass of milk are poured into a glass of tea, and the liquid is thoroughly mixed. Then three tablespoons of this mixture are poured back into the glass of milk. Which is greater now: the percentage of milk in the tea or the percentage of tea in the milk?

at t=o an evenly mixed 40 liters solution with 100grams of salt is poured into a container. solution comes in at 2 grams per liter at 3 liters per minute and flows out at the same rate. At what time is the salt solution 120 grams? I got -9.something minutes for my answer :/ This question was...

I was told I made a mistake somewhere but I can't find it. . .

I need to solve for C. I know it's probably simple but i don't remember how to. This is what I have so far:

I need to solve for C. I know it's probably simple but i don't remember how to. This is what I have so far:

A girl scout troop has 20 pounds of candy worth 80 cents per pound. the troop wishes to mix it with candy worth 50 cents per pound so that the total mixture can be sold at 60 cents per pound without any gain or loss. how much of the 50 cent candy must be used? Solve by elimination.

Homework Statement 250.0g of copper at 100.0°C are placed in a cup containing 325.0g of water at 20.0°C. Assume no heat loss to the surroundings. What is the final temperature of the copper and water? Homework Equations Conservation of Energy [SIZE="3"]mcCΔTc = mhCΔTh The...

Homework Statement A student places 21.4 grams of ice at 0.0C and 13.1 grams of steam at 100.0C in a sealed and insulated container. Determine the final temperature of the mixture. m(ice)= 21.4 g or 0.0214 kg m(steam)= 13.1 g or 0.0131 kg Ti(ice)= 278.15 K Ti(steam)= 378.15 K...

Homework Statement 10 g of water from a water ice mixture (0 degrees C) is added to100 g of water at 20 degrees celsius. what is the final temperature of the mixture? C of water =1 kcal/kg*C Latent Heat of Fusion of water=79.7 kcal/kg Homework Equations Q=mC(Tf-Ti) Q=mL The Attempt...

Homework Statement A 100g piece of ice at 0.0°C is dropped into 500g of water at 100°C. What is the final temperature of mixture. Homework Equations Q=mL (latent heat) Q=mcΔt Qw=-Qx (energy absorbed by water is equal but opposite to that of substance inserted into water) specific...

I have been told that compressing the mixture would make the explosion "more powerful". However I cannot wrap my head around why it would be more powerful. Is it because by compressing the mixture potential energy is formed and thus igniting the mixture would release the potential energy from...

Hi, I am not a chemist but maybe there is somebody who can help me. I need a put together an emergency plan as part of a college law assignment on European Seveso directives. My case study has 17t of Hydrogen and 8t of Fluorine. Both of which combine satisfy the requirement for a lower...

Homework Statement A 100-g sample of Cu(s), initially at 100oC, is added to 140 g of water, initially at 25oC. What is the final temperature of the mixture? Specific heat (in J g-1 oC-1) Cu(s) 0.385 H2O(l ) 4.184 Homework Equations Q = m * ΔT * c heat lost = heat gained m1 * ΔT1 * c1 =...

Homework Statement What is the specific gravity of a mixture 40% ethyl alcohol and 60% water? The specific gravity of ethyl alcohol is 0.79.Homework Equations The Attempt at a Solution He showed us a way to do it for another type of problem but I approached it a bit differently and I wanted to...

How is it possible to completely vaporize a mixture at constant temperature? I have seen listed values for ΔH(Vaporization); however, this doesn't quite make sense to me. If a mixture (with two largely diffent boiling points) is at its boiling point in the liquid state and I want to completely...

Dear all I am working with a Gamma-Poisson mixture distribution where (and this is not usual) the support of the Gamma distribution (in fact, I am able to restrict to the neg exponential instead of the Gamma...) is finite, e.g. [0,1]. I would like to derive the mean and a Likelihood...

I'm just starting to learn thermodynamics. I was just wondering that in case of a mixture of two gases, if we assume that each gas behaves as a ideal gas, does it imply that the mixture will also behave as an ideal gas? Or do we have to state it separately while making assumptions in our problem?

I need help with a question. I think I have an answer, but don't know if it's right. It also doesn't add up to 0 if I plug in the final temperture into the equation. But I keep getting the same answer. Help please! A 150 g piece of copper at 90°C is placed in 250 g of water at 20°C. Assume...

what's the formula for the density of a gas mixture? Thank you! ρ1=m1/v1 ρ2=m2/v2 but the gas mixture isn't ρ1+ρ2.

Homework Statement A 1.01 kg mass is attached to a spring of force constant 9.5 N/cm and placed on a frictionless surface. By how much will the spring stretch if the mass moves along a circular path of radius 0.485 m at a rate of 2.14 revolutions per second? What i was thinking was using the...

Hi guys, I am doing a lab experiment which involves analysis of a sample of a mixture of NaCl and KCl. I'm using volumetric titration ( Mohrs and Fajans methods) as well a Gravimetric analysis technique. The underlying idea is determine the mass percent of chloride in the same sample using...

Homework Statement Constant area mixing tube with stations (1) and (2) (i.e., (1)-->-->--(2)) At station (1): - Mixture of two air streams, defined as Primary (p) and Secondary (s) u_p = 300 m/s T_p = 900K u_s = 30 m/s T_s = 300K p_1 = 0.1 MPa (A_p)/(A_s) = 1/3 1-D flow assumed...

HOW IS THE FOLLOWING QUESTION DONE? Milk chocolate is being produced in a 300 litre tank, which initially contains 100 litres of milk. The following things then occur simultaneously:  1. Liquid cocoa (made up of equal parts cocoa solids and cocoa butter, both in liquid form) is added at...

How is this question done?? Milk chocolate is being produced in a 300 litre tank, which initially contains 100 litres of milk. The following things then occur simultaneously:  1. Liquid cocoa (made up of equal parts cocoa solids and cocoa butter, both in liquid form) is added at a rate...

Hi, I'm not sure what I just created. First I mixed sodium iodide with hydrochloric acid. Then to that I added a hydrogen peroxide/ sulfuric acid mixture (thinking it was just hydrogen peroxide). It seems a black precipitate is forming. I was trying to make potassium iodide using an...

O hai, PF So, again, I come in the seek of help. I am usually good for my level on Chemistry, but this question was too hard for me. In the lab, we added 0.8 g of KOH and 30 ml of H2O. Then, 1g of dextrose and methylene blue. Final results were a liquid blue mixture. Thing is, when that thing...

Homework Statement A rigid tank contains 5 lb of a two-phase, liquid-vapor mixture of H2O, initially at T = 260 F with a quality of 0.6. Heat transfer to the contents of the tank occurs until the temperature is T = 320 F. Show the process on a p-v diagram. Determine the mass of vapor, in lb...

Homework Statement 160g of steam at 100°C is added to 1000 g of ice at 0°C. What is the equilibrium temperature of the mixture? Assume the container has a negligible heat capacity. Homework Equations Qloss+Qgain=0;[m*c(delta T)] + [m*c(delta T)] = 0 The Attempt at a Solution i...

Homework Statement Let q be a mixed state which we mix from pure states. What are the weights we must take for the pure states, respectively? Let us start the solution with the two-state system. The Attempt at a Solution My problem is I can't decypher what the problem actually is, from...

A flask contains 500 mL of an acid with a pH of 4. If 500 mL of water is added, what will the pH of the new solution be? I don't want to know the answer please* I'm just wondering if it is as easy as adding the two pH's ie. 7 + 4 or do I have to work out the H+ of each ie. 10-7 and 10-4...

Hi there, I am reading several books on quantum mechanics and they mention some concepts on coherently and incoherently superpose a bunch of wave functions. As my understanding, if there are series of wave functions, which satisfying a certain distribution, the coherent way to calculate the...

This month I surprised myself in a fashion unusual for me. Having attended less than 20% of my lecture courses throughout this academic, continually abused drugs and alcohol, gotten into severe financial difficulties, and ruined my relationship with my parents, I estimated that my average mark...

Is there a closed form expression for finding all the roots of the derivative of a k-component gaussian mixture model?

Hey guys, I would like to create a mixture out of two liquids with an ideal flash point of around 70ºF. The liquids I have to work with are 200 proof (100%) isopropyl alcohol (2-propanol) and aliphatic hydrocarbon mixture (aka hydrotreated petroleum distillates). What I'm looking for is the...

Homework Statement A 155-g piece of copper at 188oC is dropped into 250.0 g of water at 23.7oC. (The specific heat of copper is 0.385 J/goC.) Calculate the final temperature of the mixture. (Assume no heat loss to the surroundings.) Knowns. 155g Copper Initial Temp 188 C 250.0g Water Initial...

Homework Statement calculate the final temperature when 20 grams of steam at 100°C is added to 100 grams of ice at -40°C. Homework Equations Q=mcΔt and Q=ML The Attempt at a Solution I tried solving this problem using -ΔQheat = ΔQcold, but the final temperature that I found was past...

Homework Statement I need some help with the following problem: Consider a thermally insulated enclosure containing an ideal gas initially separated by a thermally insulated partition into two separate regions. One region is at pressure p1=100 Pa, temprature T1=200 K, and volume V1 = 10 m3...

Can somebody explain what happened in this experiment? The mixture of toluene/water was heated to its boiling point (without a condenser) of about 84C. Over the course of under a few minutes, the boiling point increased rapidly and then remained constant at about 96C (more or less- it jumped up...

I have just done a lab on measuring the change in volume of an ethanol-water mixture. One of our tasks is to use the intercept method to determine the specific volumes of both the water and ethanol components at certain concentrations using a tangent line. I have the tangent line at 50%...

Homework Statement A tank contains 1000L of brine with 15 Kg of dissolved salt. Pure water enters the tank at a rate of 10 L/Min. The soultion is kept thoroughtly mixed and drained from the tank at the same rate. How much salt is in the tank(a) after t minutes and (b) after 20 minutes...

I have a mixture of multivariate normal distributions, and I want to compute the integral with the first element of the input vector varying between specified limits, and the other elements varying from -infinity to +infinity. See attached pdf for equations. I've done it numerically but would...

The problem and attempt at solution are typed below