# 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

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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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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)