Gujarati
11.Thermodynamics
medium

An ideal gas is expanded adiabatically at an initial temperature of $300 K$ so that its volume is doubled. The final temperature of the hydrogen gas is $(\gamma = 1.40)$

A

$227.36 K$

B

$500.30 K$

C

$454.76 K$

D

$ - {47^o}C$

Solution

(a) $T{V^{\gamma – 1}} = $constant

==> $\frac{{{T_2}}}{{{T_1}}} = {\left( {\frac{{{V_1}}}{{{V_2}}}} \right)^\gamma }$

==> ${T_2} = {T_1}{\left( {\frac{{{V_1}}}{{{V_2}}}} \right)^\gamma }$

$ \Rightarrow {T_2} = 300{\left( {\frac{1}{2}} \right)^{0.4}} = 227.36\;K$

Standard 11
Physics

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