How many joules of heat are evolved by a reaction in a calorimeter where the temperature of the bomb and the water increases from 19.50°C to 22.83°C? The bomb has a heat capacity of 650.0 J/°C, and the calorimeter contains 320.0 g of water.

Question

Chemistry

Vivian Craig

5 April, 18:36

How many joules of heat are evolved by a reaction in a calorimeter where the temperature of the bomb and the water increases from 19.50°C to 22.83°C? The bomb has a heat capacity of 650.0 J/°C, and the calorimeter contains 320.0 g of water.

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Answers (1)

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Alma Carney · Answer 1

The number of joules of heat that are evolved by a reaction in a calorimeter is 692,640 joules

calculation

Heat = MCΔT where,

M (mass) = 320.0 g

C (specific heat capacity) = 650.0 j/c

ΔT (change in temperature) = 22.83-19.50 = 3.33 C

heat is therefore = 320.0 g x 650 j/c x 3.33 c = 692,640 joules