__Question 13.2__:

__Solution__:*P*), volume (

*V*), and absolute temperature (

*T*) is given as:

*PV*=

*nRT*

Where,

*R*is the universal gas constant = 8.314 J mol

^{–1}K

^{–1}

*n*= Number of moles = 1

*T*= Standard temperature = 273 K

*P*= Standard pressure = 1 atm = 1.013 × 10

^{5}Nm

^{–2}

∴ V = nRT / P

= 1 X 8.314 X 273 / (1.013 X 10

^{5})

= 0.0224 m

^{3}

= 22.4 litres

Hence, the molar volume of a gas at STP is 22.4 litres.

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