Molar Specific Heat: Difference Between CV & CP

In summary, the difference between the molar specific heat at constant volume and at constant pressure is that the former refers to the amount of heat needed to increase the temperature of a substance without changing its volume, while the latter refers to the amount of heat needed to increase the temperature of a substance while also allowing it to expand. The equations related to this topic include the first law of thermodynamics, ΔE = Q - W, and it would be helpful to define both specific heats before discussing further. However, it seems that the person asking the question has found the answer and may not be willing to share it.
  • #1
Charanjit
48
0
1. Homework Statement

What si the difference between the molar specific heat at constant volume and at constant pressure?




Homework Equations





The Attempt at a Solution

 
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  • #2
Please show the work you've done on the problem so far, then you'll likely get suggestions for continuing.
 
  • #3
This is a qualitative question not quantitative. But for some equations that do go with this are the following:
Delta(E)=Q-W --First law of Thermodynamics
 
  • #4
It would be a good idea to define both: the specific heat at constant volume, and the specific heat at constant pressure.
 
  • #5
Nevermind, I found the answer.
 
  • #6
Would you be willing to share what you learned to help others with the same question?
 

What is molar specific heat?

Molar specific heat is a measure of the amount of heat energy required to raise the temperature of one mole of a substance by one degree Celsius.

What is the difference between CV and CP?

CV and CP refer to the molar specific heat at constant volume and constant pressure, respectively. CV is the amount of heat required to raise the temperature of one mole of a substance by one degree Celsius at constant volume, while CP is the amount of heat required to raise the temperature of one mole of a substance by one degree Celsius at constant pressure.

Why is CP greater than CV?

CP is greater than CV because when heat is added to a substance at constant pressure, some of the energy is used to do work on the surroundings, such as expanding the substance. This means that more energy is required to raise the temperature of the substance by one degree Celsius at constant pressure compared to constant volume.

How is molar specific heat measured?

Molar specific heat can be measured experimentally by using a calorimeter, which is a device that measures the amount of heat absorbed or released by a substance. The change in temperature of the substance is then used to calculate the molar specific heat.

What factors can affect molar specific heat?

Molar specific heat can be affected by the type of substance, temperature, and pressure. Different substances have different molar specific heats due to differences in their molecular structures. Temperature and pressure also play a role, as they can affect the movement and spacing of molecules, thus influencing the heat capacity of the substance.

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