Part 2- Heat of Sublimation of Dry Ice (CO2) 10.92 4.5°C 49 11 cal 41ca Mass of

Question

Part 2- Heat of Sublimation of Dry Ice (CO2) 10.92 4.5°C 49 11 cal 41ca Mass of water in calorimeter AT of the H2O in the calorimeter (by how many degrees did the temperature of water in the cup go down?) Heat energy (in calories) lost by the water in the calorimeter heat energy SxmxAT 1.00 cal/(g c) Total amount of heat energy (in calories) gained by CO2 (this is the same as the number in the line above) HEAT OF SUBLIMATION of CO2, AHsub, in calories/gram: the line above is total calories absorbed by the Dry Ice; divide this number ?? , 11 calla by the number of grams of Dry Ice to find calories absorbed by each gram) HEAT OF SUBLIMATION of CO2, &Hsub;, in kilojoules/mole (kJ/mol): 1 calorie =4.184 joules

Explanation / Answer

Heat of Sublimation of CO2 = 96.17 cal /g

= 96.17×4.184 J/g

= 402.37 J/g

to convert mol/g multiply with molecular weight of CO2

= 402.37J/g ×44 g/mol

= 17704.28 J/mol

= 17.042 KJ/mol

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