Question

Two mole of an ideal monoatomic gas at temp 4T₀ and 3 mole of ideal diatomic gas at temp 2T₀ are kept in thermal contact. Calculate the equilibrium temperature –

• A. $\frac{15}{7}$T₀
• B. $\frac{18}{7}$T₀
• C. $\frac{22}{7}$T₀
• D. None

Answer 1

Answer: (B)

$\frac{18}{7}$T₀

Answer 2

T = $\frac{2 \times 3 \times 4T_{0} + 3 \times 5 \times 2T_{0}}{2 \times 3 + 3 \times 5}$ = $\frac{54T_{0}}{21}$ = $\frac{18}{7}$ T₀