Lab 3.2 Measuring Heat Transfer

In this lab the quantity of heat transferred was calculated after mixing hot and cold water.

Heat is the energy transfer due to differences in temperature between an object or substance and its surroundings. Heat is transferred from hotter areas to colder areas. According the kinetic model, the hot water particles have more kinetic energy and the cold water particles have less kinetic energy. The energy transfer causes the change in temperature of each until they reach the same temperature. The change in temperature is only one factor in the calculation of heat transfer. The heat transfer equation is q = m•C•∆T. The unit for heat energy (q) is a Joule (J). The m is the mass of the substance. The C is a constant known as specific heat. The specific heat constant of liquid water is 4.18 J/g˚C (if we use any substance other than water we will need a different value for C). The ∆T is the change in temperature of the substance. (∆T = Tfinal – Tinitial )