Physics GRE GR 1777 Problem 008

008. Thermodynamics (Laws of thermodynamics)

You should know about

• First law of thermodynamics

where is the amount of heat, is the internal energy, is the pressure, and is the volume of the system.

Solution

If we want to make a process that the increase in the internal energy is equal to the heat supplied, we should get rid of the second term of the above equation. That means, should be zero.
The process that the equals zero is called the constant volume process, therefore the answer is (B).

Answer

(B) Constant volume

References

https://en.wikipedia.org/wiki/First_law_of_thermodynamics