Question

One mole of monoatomic ideal gas expands adiabatieally at initial temperature T against a constant external pressure of I atm from 1 L to 2 L. Find out the final temperature $(R = 0.0821\: atm \: K^{-1}m oI^{-1})$

• A. T
• B. $\frac{T}{ (2)^{\frac{5}{3}-1}}$
• C. $T -\frac{2}{ 3 \times 0.082}$
• D. $T + \frac{2}{ 3 \times 0.082}$

Answer 1

Answer: (C)

$T -\frac{2}{ 3 \times 0.082}$

Answer 2

In case of reversible thermodynamic process, $\, \, \, \, \, \, \, \, \, \, \, ? H = nC_p ? T$ $\therefore \,$ Process is isothermal, $\, \, \, ? T = 0 \Rightarrow \, ? H = 0$