For a gas,the ratio C_p/C_v is 1.3 and its at | vedclass

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(A) The ratio of heat capacities is given by $\gamma = C_p/C_v = 1.3$. For a gas,$\gamma = 1 + 2/f$,where $f$ is the degrees of freedom. $1.3 = 1 + 2/

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$M$

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(A) The ratio of heat capacities is given by $\gamma = C_p/C_v = 1.3$. For a gas,$\gamma = 1 + 2/f$,where $f$ is the degrees of freedom. $1.3 = 1 + 2/f \implies 0.3 = 2/f \implies f = 2/0.3 \approx 6.67$. However,in standard physics/chemistry problems,$1.3$ is often an approximation for $\gamma = 4/3 \approx 1.33$ (for polyatomic gases with non-linear structure,$f=6$,$\gamma = 1 + 2/6 = 1.33$). If we assume the gas is polyatomic with $f=6$,the molecular mass is simply the mass of the molecule,which is $M$ (given as atomic mass,but usually implies molar mass in this context). Given the options,if $\gamma = 1.33$,the gas is polyatomic. The molecular mass of a gas with atomic mass $M$ is $M$ itself if it is monatomic,but if it is a molecule like $X_n$,the molecular mass is $n 	imes M$. Looking at the options provided and the standard nature of such questions,if the ratio is $1.3$,it implies a complex molecule. However,if the question implies the relationship between atomic mass $M$ and molecular mass,and given the options,the most logical answer is $M$ assuming the gas is treated as a single entity.

For a gas,the ratio $C_p/C_v$ is $1.3$ and its atomic mass is $M$. What is the molecular mass of the gas?

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