just b 0 Question 2 0s 38 Sherbe sherbet contains sodium hydrogencarbonate, NaHC

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just b

0 Question 2 0s 38 Sherbe sherbet contains sodium hydrogencarbonate, NaHCO3 and tartaric acid (2,3- dihydroxybutanedioic acid) t lemons are sweets which consist of a flavoured sugar shell filled with sherbet. The HO2C CO2H Tartaric acid a) Assuming all of the sugar is present as sucrose, CizH22011, write an equation for the burpin complete combustion of sucrose, which gives carbon dioxide and water. b) The standard enthalpy change of combustion (ie the amount of heat) of sucrose is 5644 kJ mol1. Calculate the energy released when one sweet containing 6.70 g of sucrose is completely burnt.

Explanation / Answer

One mole of sucrose produces 5644 kj mol-1

Now molar mass of sucrose = 342 g

Now mole = mass/ molar mass

= 6.70/342= 0.0196 mole

Now heat released = mole * molar heat

0.0196 * 5644 = 110.57 kj

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