1.

Givenbelow are observations on molar specific heats at room temperature ofsome common gases. Gas Molar specific heat (Cv) (cal mol–1 K–1) Hydrogen 4.87 Nitrogen 4.97 Oxygen 5.02 Nitric oxide 4.99 Carbon monoxide 5.01 Chlorine 6.17 Themeasured molar specific heats of these gases are markedly differentfrom those for monatomic gases. Typically, molar specific heat of amonatomic gas is 2.92 cal/mol K. Explain this difference. What canyou infer from the somewhat larger (than the rest) value forchlorine?

Answer»

Given
below are observations on molar specific heats at room temperature of
some common gases.



































Gas



Molar
specific heat (Cv)



(cal
mol
–1
K
–1)




Hydrogen




4.87



Nitrogen




4.97



Oxygen




5.02



Nitric
oxide




4.99



Carbon
monoxide




5.01



Chlorine




6.17




The
measured molar specific heats of these gases are markedly different
from those for monatomic gases. Typically, molar specific heat of a
monatomic gas is 2.92 cal/mol K. Explain this difference. What can
you infer from the somewhat larger (than the rest) value for
chlorine?



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