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Standard XII

Chemistry

Introduction

The specific ...

Question

The specific heat of helium at constant volume is $12.6 J m o l^{- 1} K^{- 1}$ . The specific heat of helium at constant pressure, in $J m o l^{- 1} K^{- 1}$ is about:
(Assume the temperature of the gas is moderate and universal gas constant, $R = 8.314 J m o l^{- 1} K^{- 1})$

12.6

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16.8

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18.9

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21

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Solution

The correct option is D $21$

$C_{v} = 12.6$

$R = 8.314$

$C_{p} = C_{v} + R = 12.6 + 8.314 = 21$

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The specific heat of helium at constant volume is 12.6 Jmol−1K−1. The specific heat of helium at constant pressure, in Jmol−1K−1 is about:(Assume the temperature of the gas is moderate and universal gas constant, R=8.314Jmol−1K−1)

The correct option is D 21 Cv=12.6 R=8.314 Cp=Cv+R=12.6+8.314=21

The specific heat of helium at constant volume is $12.6 J m o l^{- 1} K^{- 1}$ . The specific heat of helium at constant pressure, in $J m o l^{- 1} K^{- 1}$ is about:
(Assume the temperature of the gas is moderate and universal gas constant, $R = 8.314 J m o l^{- 1} K^{- 1})$

The correct option is D $21$

$C_{v} = 12.6$

$R = 8.314$

$C_{p} = C_{v} + R = 12.6 + 8.314 = 21$