Question

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.

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