Asked Feb 9, 2020

Calculate the amount of heat required to completely sublime 25.0 grams of solid dry ice (CO2) at its sublimation temperature. The heat of sublimation for CO2 is 32.3 kJ/mol.


Expert Answer

Step 1

Given information:

Mass of dry ice = 25.0 g

Heat of sublimation of dry ice ΔHsub = 32.3 kJ/mol


Step 2

The amount of heat (q) required can be expressed in terms of number of moles (n) and heat of sublimation (ΔHsub) for a given sublimation process. The mathematical expression for this is represented as follows:

Chemistry homework question answer, step 2, image 1


Step 3

First number of moles of dry ice will be calculated as follows:

Chemistry homework question answer, step 3, image 1


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