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lecture 9 - molar specific heats

lecture 9 - molar specific heats - Announcements Prayer...

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Announcements 1/26/11 Prayer Please do this “Quick Writing” assignment while  you’re waiting for class to start:  Ralph is confused because he knows that when  you compress gases, they tend to heat up (think  of a bicycle pump nozzle getting hotter as you  force the gas from the pump to the tire). So,  how are “isothermal” processes possible?  How  can you compress a gas without its temperature  increasing?

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Demo Constant volume change, aka “alcohol rocket”
Thought question How will the temperature  of the gas change during  this process from A to B? a. Increase b. Decrease c. First increase, then  decrease d. First decrease, then  increase e. Stay the same

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Reading quiz What is “C V ”? a. heat capacity  b. mass-pacity c. molar heat capacity d. molar heat capacity, but only for constant  volume changes e. your “curriculum vitae”, a detailed resum é
Thought question Which will be larger, the molar heat capacity  for constant volume changes or the molar  heat capacity for constant pressure changes?

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