evaporating CO2

[the guy]

if there is a canister of CO2 at 1200 Ibf/in² (8MPa) and the liquid CO2 is released into standard atmosphere pressure and temperature conditions, how much energy would it take for the CO2 to evaporate?

[CaptainPanic]

The heat of evaporation of CO2 is 0.57*10^6 J/kg at atmospheric pressure at the boiling point (-78.5 °C).

 

Note that the heat capacity of the solid (54.55 J/(mol K) at 189.78 K) is quite different from the heat capacity of the gas (33.89 J/(mol K) at –75°C).

[the guy]

ok thank you kindly