Answer to Question #273291 in Organic Chemistry for oli

Question

When a 2.1 kg sample of hot water in a kettle was cooled, its temperature decreased from 96.2*C to 18.5*C. How much heat did the water release?

Answer 1

The specific heat capacity of water is 4,200 Joules per kilogram per degree Celsius (J/kg°C). This means that it takes 4,200 J to raise the temperature of 1 kg of water by 1°C

Heat released = $2.1×4200×[96.2-18.5]=685314J$