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Two moles of oxygen are mixed with eight...

Two moles of oxygen are mixed with eight moles of helium. The effective specific heat of the mixture at constant volume is

A

1.3 R

B

1.4R

C

1.7R

D

1.9R

Text Solution

Verified by Experts

The correct Answer is:
C
Molar specific heat of mixture at constant volume is
`(C_(v))_("mixture")=(n_(1))C_(V_(1))_n_(2)C_(V_(2))/(n_(1)+n_(2)) = (2x(5R)/(2)+8xx(3R)/(2))/(2+8)=1.7R`
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