A monatomic gas expands at constant pressure on heating. The percentage of heat supplied that increases the internal energy of the gas and that is involved in the expansion is

Question

A monatomic gas expands at constant pressure on heating. The percentage of heat supplied that increases the internal energy of the gas and that is involved in the expansion is, 75 % , 25 %, 25 % , 75 %, 60 % , 40 %, 40 % , 60 %

MARKS App · Accepted Answer

Δ U = f 2 n R d T Δ Q = ( f 2 + 1 ) n R d T Δ U Δ Q = f 2 1 + f 2 Δ U Δ Q = 3 5 ∆ U ∆ Q × 100 = 3 5 × 100 = 60 % Remaining is used in expansion of the gas = 40%

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