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If `R = ` universal gas constant, the amount of heat needed to raise the temperature the temperature of `2 mol` of an ideal monatomic gas from `273 K` to `373 K` when no work is done is
A. `100 R`
B. `150 R`
C. `300 R`
D. `500 R`

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Correct Answer - C
c. `Delta Q = Delta U`
`= mu C_(v) Delta T = mu ((R )/(gamma - 1)) Delta T = 2 xx (R )/((5)/(3) -1) [373 - 273] = 300 R`
(as for monatomic gas `gamma = 5//3`)

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