How do you calculate the energy absorbed when #2.0x10^3g# of ice (#CO_2#) sublimate at the normal dry sublimation point? The enthalpy of sublimation 196.3J/g.
We want the energy required for the transition:
We assume that the temperature of the gas and the solid are EQUAL.
And thus we simply have to work out the product:
What would be the energy change for the reverse transition: