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a perfectly insulated rigid tank with a volume of 0.2metre cube contains a perfect gas which has a molar mass of 18kg per mole and ratio of specific heats of 1.45. initially the pressure and temperature in the tank are 9 bar and 320k respectively. A fan inside the tank is span at 360 revolutions per min for 20 seconds. The torque required to turn a fan is 30Nm. calculate the R, cp and cv values of the gad and the masd of the gas in the tank

a perfectly insulated rigid tank  with a volume of 0.2metre cube contains a perfect gas which has a molar mass of 18kg per mole and ratio of specific heats of 1.45. initially the pressure and temperature in the tank are 9 bar and 320k respectively. A fan  inside the tank is span at 360 revolutions per min for 20 seconds. The torque required  to turn a fan is 30Nm. calculate the R, cp and cv values of the gad and the masd of the gas in the tank

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