Question

The molar volume of any gas at STP is:Group of answer choices1.0 mole22.4 L0.0821 L-atm/mole-K0 degree Celcius

Answer 1

The molar volume of a substance is defined as the volume occupied by one mole. We can find this volume under the STP conditions mentioned (P=1atm and t= 273.15K) using the ideal gas equation that tells us:

`PV=nRT`

Where,

P is the pressure of the gas, 1atm.

V is the volume of the gas, this is the unknown value.

n is the number of moles, in this case, will be 1 mol.

R is a constant, 0.08206 L-atm/mole-K

T is the temperature, 273.15K

Now, we clear the volume, V. And we replace the known data:

`\begin{gathered} V=(nRT)/(P) \\ V=(1mol*0.08206(atm.L)/(mol.K)*273.15K)/(1atm) \\ V=(1*0.08206*273.15)/(1)L \\ V=22.4L \end{gathered}`

The molar volume of any gas at STP is 22.4L. Second option.