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  • When an ideal monoatomic gas is heated at constant pressure, the fraction of heat energy supplied which increases the internal energy of the gas isOption: 1</str

When an ideal monoatomic gas is heated at constant pressure, the fraction of heat energy supplied which increases the internal energy of the gas is

Option: 1

\frac{2}{5}


Option: 2

\frac{3}{5}


Option: 3

\frac{3}{7}


Option: 4

\frac{3}{4}


Answers (1)

best_answer

\mathrm{\text { Now } Q_p=n C_p \Delta T \text { and } Q_v=n C_v \Delta T \text {. But } Q_v} Qv gives the heat energy which increases the internal energy of the gas. Thus the required fraction is

\mathrm{\frac{Q_v}{Q_p}=\frac{C_v}{C_p}=\frac{1}{\gamma}=\frac{1}{5 / 3}=\frac{3}{5}}

\mathrm{\left(\because \text { for monoatomic gas } \gamma=\frac{5}{3}\right)}

 

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Sayak

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