Question
Does the heat supplied to the system always increase the internal energy only?
Solution
The heat supplied to the system increases the internal energy only during an isochoric process.
If the system undergoes isothermal or isobaric changes, then a part of heat is also used to do work. Hence, the increase in internal energy will be less than heat supplied to the system.
If the system undergoes isothermal or isobaric changes, then a part of heat is also used to do work. Hence, the increase in internal energy will be less than heat supplied to the system.
