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Question

The value of PV for 5.6 L of an ideal gas is .....x/100 RT, at NTP.
x is...............

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Solution

NTP is commonly used as a standard condition for testing and documentation of fan capacities: NTP - Normal Temperature and Pressure - is defined as air at 20oC (293.15K, 68oF) and 1 atm (101.325kPa) Density 1.204kg/m3 (0.075 pounds per cubic foot)
At NTP, P=101325Pa and V=5.6L given,so
Gas law is PV=NRT
PVRT=101325×5.6×0.0018.314×293.15=0.25
x/100=0.25
x=25

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