Question 400: Thermodynamics & KTG

Question

A diatomic gas, having $${C_p} = {7 \over 2}R$$ and $${C_v} = {5 \over 2}R$$, is heated at constant pressure. The ratio dU : dQ : dW :

Accepted Answer

$$dV = n{5 \over 2}R\Delta T$$
$$dQ = n{7 \over 2}R\Delta T$$
$$dW = dQ - dV$$
$$ = n{2 \over 2}R\Delta T$$
$$ 	herefore $$ $$dV:dQ:dW$$
$$ = n{5 \over 2}R\Delta T:n{7 \over 2}R\Delta T:n{2 \over 2}R\Delta T$$
$$ = 5:7:2$$

Answer

5 : 7 : 3

Answer

3 : 7 : 2

Answer

5 : 7 : 2

Answer

3 : 5 : 2

Thermodynamics & KTG

A diatomic gas, having ${C_p} = {7 \over 2}R and {C_v} = {5 \over 2}R$, is heated at constant pressure. The ratio dU : dQ : dW :

Choose the correct answer: