Density of a gas is found to be 5.46 g dm^-1 at 27^@C and 2 bar pressure. What will be density at STP?

Density of a gas is found to be 5.46 g dm^-1 at 27^@C and 2 bar pressu

1.	Density of a gas is found to be 5.46 g dm^-1 at 27^@C and 2 bar pressure. What will be density at STP?
Answer» Solution :d = PM/RT For the same gas (i.e,, same M) at different temperatures and PRESSURES, we can WRITE `d_1/d_2 = P_1/T_1 XX T_2/P_2` `d_1 = 5.46g dm^-3,P_1` = 2 bar,`T_1` = 300K At STP,`P_2` = 1 bar,`T_2` = 273 therefore `5.46/d_2 = 2xx273/300xx1` ` therefore d_2 = (300xx1xx5.46)/(2xx273) = 3g dm^-1`