Question
Chemistry Question on Enthalpy change
Based on the first law oi thermodynamics, which one of the following is correct?
A
For an isothermal process, Q=+w
B
For an isochoric process, ΔU=−Q
C
For an adiaoatic process, ΔU=−W
D
For a cyclic process, Q=−w
Answer
For a cyclic process, Q=−w
Explanation
Solution
According to first law of thermodynamics, ΔU=Q+W For cyclic process, change in internal energy =0 ∴Q=−W