JEE MAIN - Physics (2017 - 8th April Morning Slot - No. 15)
An ideal gas has molecules with 5 degrees of freedom. The ratio of specific heats at constant pressure (Cp ) and at constant volume (Cv) is :
6
$${7 \over 2}$$
$${5 \over 2}$$
$${7 \over 5}$$
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For ideal gas molecule with 5 degree of freedom,
Cv = $${5 \over 2}$$ R and Cp = $${7 \over 2}$$ R
$$\therefore\,\,\,$$ $${{{C_p}} \over {{C_v}}}$$ = $${{{7 \over 2}R} \over {{5 \over 2}R}}$$ = $${7 \over 5}$$
Cv = $${5 \over 2}$$ R and Cp = $${7 \over 2}$$ R
$$\therefore\,\,\,$$ $${{{C_p}} \over {{C_v}}}$$ = $${{{7 \over 2}R} \over {{5 \over 2}R}}$$ = $${7 \over 5}$$