a certain mass of gas occupies volume of 2 litre at STP. keeping the pressure constant , at what temperature would the gas occupy a volume of 4 litre?

Given: Volume = 2L
​At STP, Pressure, P1 = 1 atm and Temperature, T1 = 273 K
Final Volume, V2 = 4L 
To find: Final temperature, T2
​Solve: As we know
PV = nRT
Now, for given number of moles at constant pressure volume is directly proportional to temperature. We can write as

V2V1=T2T142=T2273T2 = 273×2= 546 K

Temperature in degree Celsius = 546-273
= 2730C
The correct option is (2).

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