stion 3 0 out of 3 points Kemmi Major does some experimental work on the combust

Question

stion 3 0 out of 3 points Kemmi Major does some experimental work on the combustion of sucrose: C12H22011(s) + 1202(g) 12 CO2(g) + 11 H20) She buns a 0.05392 g pellet of sucrose in a bomb calorimeter with excess o Selected Answer: -0.00582 kl/mol Feedback: xygen. She determines the grxn to be-916.6 J for the reaction. Calculate the AH ralue for the combustion reacion. (Round the answer to 3 significant digits, units of k, pay attention to positive or negative.) Response To answer this question, the mass of sucrose must be converted to moles. Then determine the AM value by dividing the oran value by the number of moles of sucrose reacted. Remember to change the units to kJ.

Explanation / Answer

Molar mass of sucrose = 342.2965 g/mol

Weight of sucrose used = 0.05392 gm

Moles of Sucrose = 0.05392 / 342.2965 = 1.57 x 10-4 Moles

Heat released = -916.6 joules

Delta H = 916.6 / 1.57 x 1000 x 10-4 = 5818.78 Kilo Joules

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