Question

An ideal gas has molar specific heat Cp at constant pressure. When the temperature
of n moles is increased by ∆T the increase in the internal energy is
A. np ∆T
B. n(Cp+R) ∆T
C. n(Cp-R) ∆T
D. n(2Cp+ R) ∆T​

Answer 1

Answer:

C. is the answer

change in internal energy=nCvR ∆T

Cp-Cv=R , Cv=Cp-R

so n(Cp-R)∆T

Answer 2

Answer:

Charlie

Explanation:

Qp=∆U+W

∆U=Qp-W=nCp∆T-P∆V=nCp∆T-nR∆T=n∆T(Cp-R)=n(Cp-R)∆T