Question

critical temperature give it value co2

Answer 1

Critical pressure is the pressure required to liquify a gas at critical temperature. For eg. Critical temperature of CO2 is 31.2°C and critical pressure is 73 atm. above 31.2°C, CO2 can't be liquified wether you apply 100 atm pressure.

 

RMS speed = Square root (3RT/M) where  

R = 8.314 kgm^2/s^2,  

T = Kelvin temperature  

M = molar mass in kg/mol  

For CO2 at STP:  

RMS speed = Square root (3 (8.314)273.15K / 0.04401 g/mol) = 393 m/s

Answer 2

Critical pressure is the pressure required to liquify a gas at critical temperature. For eg. Critical temperature of CO2 is 31.2°C and critical pressure is 73 atm. above 31.2°C, CO2 can't be liquified wether you apply 100 atm pressure.