Question

The figure shows two paths for the change of state of a gas from A to B. The ratio of molar heat capacities in path 1 and path 2 is –

• A. > 1
• B. < 1
• C. 1
• D. Data insufficient

Answer 1

Answer: (B)

< 1

Answer 2

Q₂ = W₂ + DU = nC₂DT

Q₁ = W₂ + DU = nC₁DT

$\frac { \mathrm { C } _ { 1 } } { \mathrm { C } _ { 2 } }$ = $\frac { \mathrm { W } _ { 1 } + \Delta \mathrm { U } } { \mathrm { W } _ { 2 } + \Delta \mathrm { U } }$ < 1 [Q W₁ < W₂]