A hot solid of mass 100 g at 100°c is quickly transferred into 100 g of water in a container of mass 200 g at 20°C. Calculate the resulting temperature of the mixture. Specific heat capacity of the solid and the container is 400 J/kgK.

Answer 1

heat gained/lost = mass * specific heat * temperature change

the heat lost by the "hot solid" is gained by the water and container