Question

(Note:click on Question to enlarge)
An ideal gas is best described by- (Symbols have usual meanings)
A. p = VR/T
B. pv = R/T
C. pv = nT/R
D. PV=RT​

Answer 1

Answer:

Solution:- (C) ΔU=1−γPfVf−PiVi

As we know that,

ΔU=nCvΔT

Whereas,

n= No. of moles

Cv= Heat capacity at constant volume =γ−1R

ΔT= Change in temperature =Tf−Ti

∴ΔU=nγ−1R(Tf−Ti)

⇒ΔU=γ−1nRTf−nRTi.....(1)

Now from ideal gas equation, 

PV=nRT

For the same no. of moles of a gas,

nRTf=PfVf

nRTi=PiVi

Substituting these values in eqn