Heat capacity Definition and 419 Threads

"What is the specific heat capacity of a 50-gram piece of 100 degree C metal that will change 400 grams of 20 degrees C water to 22 degrees C? Could someone please explain to me how to do this problem? I have to figure it out on my own because my teacher is no help at all. Thanks in advance.

Calculate the heat capacity ratio for a diatomic ideal gas. ---- Using the equipartition theorem, I calculate: Cp / Cv = (Cv + R) / Cv = (7/2 R + R) / (7/2 R) = (9/2 R) / (7/2 R) = 9/7 ~ 1.286 According to the equipartition theorem, I assign each vibrational degree of freedom 1 R and...

I am looking for a resistor that can dissipate a constant amount of heat at all temperatures immediately. I have been using some metal film/oxide resistors, but it takes a very long time before the resistor starts radiating heat. I think the material making up the resistor has such a high...

Homework Statement Quistions: 1-adding the same amount of heat to two samples does not produce the same increase in temperature. What physical parameters of hte bodies might be different? 2-We have a sample of metal with mass m. We supply an amount of heat Q and the temperature rises...

Homework Statement The specific heat of a certain metal can be determined by measuring the temperature change that occurs when a piece of the metal is heated and then placed in an insulated container that is made of the same material and contains water. Suppose the piece of metal has a mass of...

Hello, everyone. Homework Statement Now, I recently did an experiment in school to determine the Specific Heat Capacity of rubber using a calorimeter. We're using the mixing method to figure it out. The mass of the calorimeter, rubber and water was measured. And the S.H.C is already known...

Homework Statement Below about 80 K the heat capacity at constant volume for hydrogen gas (H2) is 3/2k per molecule, but at higher temperatures the heat capacity increases to 5/2k per molecule due to contributions from rotational energy states. Use these observations to estimate the distance...

Is it possible to find specific heat capacity given mass, initial and final temperature, and time? The liquid in question has not been given

1. The tangential frictional force exerted by a band brakes on a rotating metal drum of circumference 0.25m is found to be 20N. If the mass of the drum is 0.4kg and its specific heat capacity is 0.35 kJ/kg K, calculate the number of complete revolutions of the drum are required to increase its...

Homework Statement Calculate the standard enthalpy change (##\Delta H##) at 25 degrees Celsius and 927 degrees Cesius for the reaction, WCl4(g) + CH4(g) = WC(s) + 4HCl(g) Data: WCl4(g): ##\Delta H298## = -336 kJ/mole; Cp (heat capacity at constant pressure) = 105.6 J/mol*K HCl(g): ##\Delta...

Hi, I was woindering if anyone can help me on a problem I have been stuck on for a while now. I have an equation to combine the heat capcity of oil and water, but I can't find an equation anywhere that combines the heat capacities for water oil and gas. All i have is CpL =...

Hi, Can someone please give me some suggestions on how to use a microwave oven to determine the specific heat capacity of tap water? This is not a homework question, but an assignment and I have absolutely no idea how I can do this.This experiment will be done at home, so please no immersion...

Homework Statement Is it possible to convert ml to grams for a Heat Capacity and Specific Heat type of problem? The problems that I have done so far did not use ml at all. I am stuck with the following problem: A piece of stainless steel (specific heat = 0.50 J g-1 oC-1 ) is taken from an...

For a gas that obeys the equation of State P(v-b) = RT, where b is a constant, show that Cp is independent of Pressure, i.e., (\deltaCp/\deltap) at constant T is equal to zero Homework Equations Maxwell Relations H = U+PV dh = TdS + PdV dh/dT at constant P is defined as Cp The...

Homework Statement Why would vibrational and rotational degrees of freedom affect the heat capacity ratio more for N2 and CO2 than He or Ar? Would this occur at room temperatures? Homework Equations d.o.f.: 3N vibrational d.o.f., linear molecule: 3N - 5 nonlinear: 3N - 6 The...

Homework Statement Derive the following expression for calculating the isothermal change in Constant Volume Heat Capacity: (dCv/dV)T = T(d2P/dT2)V Homework Equations The Attempt at a Solution I have no idea, please help

Homework Statement Make that specific heat capacity xD Well anyways, I did 5 trials trying to calculate the specific heat capacity of copper. I measured the temperature of metal, initial temperature of water, final temperature of water, calorimeter mass, mass of water etc. When I'm...

Homework Statement Plot the heat capacity as a function of temperature for aluminium, using the Einstein model. Homework Equations The Einstein model for heat capacity: The Attempt at a Solution The model assumes that the frequencies of all the harmonic oscillators in the material are...

Homework Statement A quantity of 100g of ice at 0°C and 50g steam at 100°C are added to a container that has 150g water at 30°C. What is the final temp of the container? Ignore the container itself in the calc. Homework Equations Q=mc (change in T) Q=mLThe Attempt at a Solution I know how to...

i found the average specific heat of a metal through an experiment it is 200. my only problem now is identifying it. i have tried many website but can't find anything useful please make some suggestions

simple application please..o:)

can anybody tell me how the specific heat capacity varies with pressure and temperature for superheated vapors thanks

Homework Statement to determine the specific heat of a metal alloy, a 0.150 kg of the substance is heated to 400 degrees C ad then placed in a 0.20 kg aluminum calorimeter containing 0.40 kg of water. if a 14 g of ice is placed on it and the mixture reached the temperature of 30.5 degrees C...

what is the spec heat capacity of bronze?? pls tell me..i can't find on the net and it's the only thing i need to solve my homewrk problem..

Homework Statement A system posesses three energy levels E1=ε, E2=2ε, E3=3ε with degeneracies g(E1)=g(E3)=1 , g(E2)=2 Find the heat capacity of the system. Homework Equations Z=e-βε+e-2βε+e-3βε d2lnZ/dβ2=kT2C The Attempt at a Solution i got the partition function and then...

Just revising for my practical physics exam tomorrow and got stuck on this! not sure if its correct, just annpyed me that i was unsure! Homework Statement A vending machine for serving hot drinks has a tank of capacity 7.5 litres, and the manufactuurers say that 45 cups of hot water (at 99o...

Homework Statement Consider the anharmonic potential U(x)=cx2-gx3-fx4 and show that the approximate heat capacity of the classical unharmonic oscillator in one dimension is C=kb[1+(3f/2c2+15g2/8c3)kbT] Homework Equations U(x)=cx2-gx3-fx4 and heat capacity is C=dU/dT The...

what is" negative heat capacity"? what is "negative heat capacity"? what is the example of it?

When a 35 gram piece of some metal at 100°C is placed in water, it loses 775 calories of heat while cooling to 30°C. Calculate the specific heat capacity of this metal. Q = mc(DELTA)T T = 70 degrees C m = 35 g Q = 775 cal ?? When i plugged it in i got 0.34 but the program said it...

Homework Statement hey guys I've got a question. 'calculate the amount of heat necessary to raise the temperture of 12kg of water from 15.4degrees to 93 degrees. My working= h=mCdelatT m=12000 C? Delta T=77.6K just wondering how i find C? (heat capacity) thansk for any help...

Homework Statement How much milk at 11 degrees Celcius was added to 0.16 kg of coffee at 91 degrees Celcius if the final temperature is 76.8 degrees Celcius? Homework Equations Well my teacher explained how to rearrange cm∆T = cm∆T to somehow come up with an equation to solve for the...

http://www.ph.ed.ac.uk/~pmonthou/Statistical-Mechanics/documents/SM9.pdf In the third last paragraph of p36, we are told that the Einstein model discussed in this lecture succesfully explains the low heat capacity of diamond - i can't however see how it does, or at least find an explanation...

Homework Statement How much ice was added to a 0.75 kg jug of lemonade at 15 degrees celcius if the final temperature of the jug is 8 degrees celcius? (Assume the lemonade has the specific heat capacity of water.) Homework Equations Q = cm∆T The Attempt at a Solution Well I think I...

The task is to derive an expression for the heat capacity of a system at constant volume and show that at high temperatures it is inversely proportional to the square of temperature. As far as I'm concerned the relation between internal energy and heat capacity is: Cv=dE/dT However with...

Homework Statement 50ml of water at 49.6 C were mixed with 50ml of water at 25.1 C in a calorimeter also at 25.1 C. The final temperature was 30.1 C Assuming that neither the density of water nor its specific heat capacity change with temperature, calculate the total heat capacity of the...

im doing a calorimeter experiment and need to find the specific heat capacity of the calorimeter, but always gets a negative answer. Initial temp = 23 C Final temp = 60 C Change in temp = 37 C Mass of calorimeter = 0.027645kg Mass of water = 0.1kg Specific heat capacity water = 4200...

if I am doing a reaction of acids and bases, do i just use the specific heat capacity of 4.18J, or is there a different one for different solutions?!?

Homework Statement The specific heat capacity of Albertsons pasta is approximately 1.8 J/g*C degrees. Suppose you toss 340 g of this pasta (at 25 degrees celsuis) into 1.5 liters of boiling water. What effect does this have on the temperature of water. (before there is time for stove to...

I've read that: specific heat capacity at constant pressure = dU-W / m. dT dU = change in internal energy W = work done m = mass of gas dT = change in temperature ----------------------------------- However, shouldn't the right hand side equate to specific heat capacity at...

Homework Statement For temperatures T >> T_C (critical temperature) derive the heat capacity at constant pressure C_P from van der Waals equation. Homework Equations Critical temperature: T_C = \frac{2N(V - Nb)^2}{kV^2} T_C is derived from the fact that it exist at the point in which...

1. Assume that a car who has a mass of 1000kg (including driver) is initially rolling freely (without using the engine) down a 30° slope at a speed of 5m/s. The brakes are used causing the car to stop after 10 m. Find the HEAT CAPACITY of the brakes if they rise in temperature by 10 K...

Hi guys, Just like to check with you: How does heat capacity, density and conductivity plays a part in the melting of a certain material. I mean, if a material has a lower heat capacity, while other factors are the same, does that mean it will melt faster compared to one with a higher...

Homework Statement What is the the specific heat capacity at constant volume of Air?, with temperature 300k and pressure = 1 atm. Homework Equations The Attempt at a Solution Do I assume that this is a diatomic ideal gas and thus Cv = 5/2 ? Thanks.

Homework Statement The diagram below shows a one-dimensional row of 5 microscopic objects each of mass 410-26 kg, connected by forces that can be modeled by springs of stiffness 26 N/m (so each object can be modeled as if it were connected to a single spring of effective stiffness 4ks = 104 N/m...

Homework Statement a 4kg iron hammer is initally 700 degree celcius is droppped into a bucket containing 20kg of water at 25degree celcius. what is the final temperture Homework Equations q=mc(delta)T The Attempt at a Solution m1=4kg m2=20kg T1=700=973K T2=25=298 i know...

Does anyone know where I might be able to find the specific heat capacity of steel (in English units)? Thank you!

Homework Statement When you take a bath, how many kilograms of hot water (49°C) must you mix with cold water (12°C) so that the temperature of the bath is 36°C? The total mass of water (hot plus cold) is 191 kg. Ignore any heat flow between the water and its external surroundings. Temperature...

Hi all, I have to show that the heat capacity can be expressed as Cv = Nk(1+1/45(Om/T)^2 + ...) where the internal energy is given as E = NkT*(1-(Om/(3T)-1/45(Om/T)^2) Normally I would just differentiate but if I do this I get something completely different - how to proceed any...

I am stuck on my Physics work. I have already completed the first 10 questions but I do not understand these, can someone please help me with a method of how to find out. 1. When 0.25kg or water at 70C is mixed with water at 20C the final temperature of the mixture is 30C. find the mass of...

is there another way of considering the specific heat capaciaty of a material (many gas) other than with respect to the number of degrees of freedom with gives a constant out put for all monocrmatic gases for all temperature and pressure. For a monocromatic gas c=(3/2)*n*R*m where m = mass...