Question

An increase in enthalpy leads to an increase in __________

(a) Increase in pressure

(b) Increase in volume

(c) Increase in internal energy

(d) Increase in mass

This question was addressed to me in an online quiz.

This question is from First Law of Thermodynamics topic in chapter Fluid Dynamics of Fluid Mechanics

Answer 1

Right choice is (c) Increase in internal energy

The explanation: When the temperature increases, the amount of molecular interactions also increases. Using the equation from the first law of thermodynamics, internal energy also increases with the increase in temperature. Thus, increase in enthalpy leads to an increase in internal energy.