Recent content by Nellen2222

Homework Statement Complete combustion of a 0.0150 mol sample of a hydrocarbon, CxHy, gives 1.680L of CO2 at STP and 0.810g of H2O a) what is the molecular formula b) what is empirical formula Homework Equations pv=nRt The Attempt at a Solution a) mol of co2: n=pv/Rt=1 atm *...

Im not getting it... your saying I know heat at point 1 which is 100deg celsius i agree, i find heat at point 2 with the ideal gas law and i get 74.6K at point 2... now what... Its been hours, can you please direct me withalot more clarity so I can move on with my life?

T is 60.795J/20.8 = 2.92 mol*k ... don't see where this is going still? for 1--2 the answer is 150J, I am still not seeing it..

I don't understand what youre trying to say. Cp for a monoatomic gas is 20.8. How does that formula help me at al? I stil don't have moles, or ΔT at point 2. Elaborate please..? As far as I can see i have 3 unknowns. Q, n, and T for point 2. I still don't get where to go after calcilating...

Homework Statement A monoatomic gas follows the process 1--> 2---> 3---> shown in the figure. How much heat is needed for (a) process 1-->2, and b process 2-->3 ? Link...

Here is another question: Write the chemical equation for the standard molar enthalpy of formation of proponol. c3h8O Is this simply :: 3C + 8H + O2 ----> C3H8O ( I am pretty sure its this one.) ? Or is it 3CO2 + 4H2O ----> C3H8O + 9/2O2 Thanks

elaborate...?

Homework Statement The standard heat of formation of n butane cannot be measured directly but can be determined indirectly from other heats of reaction by applying hess's law. Given the folowing data for the combustion of carbon hydrogen and n butane in oxygen: C + O2---> CO2 H=-393.5...

Bump... anyone?

Homework Statement Each of the following salts can be prepared from an acid and a base. Write the balanced molecular equation and the net ionic equation for the preperation of each. indicate states of the reactants and producys . Review solubility rules if neccesary to determine the...

2.5 seconds per inahalation

Homework Statement Reynolds number and the turbulence of trachael air flow under the conditions of normal activity an adult inhales about 1.1l of air during each inhalation. using a stop watch, dTErmine the time for one of your own inhalations and hence estimate the volume flow in m^3/s...

Degrees celsius to Farenheight, Conversion issues ! Homework Statement You work in a materials testing lab ad your boss tells you to increase the temperature of a sample by 41.7 degrees celsius. Theo nly thermometer you can find at your workbench reads in degrees fahrenheit. If the initial...

I got 0.3m^3/s does it make sense?

Fun physics activity! Homework Statement Under the conditions of normal activity an adult inhales about 1.1l of air during each inhalation. Using a stopwtch, determien the time for one of your own inhalations (avg several to get two significant digits) and hence estimate the volume flow in...