GENERAL KNOWLEDGE

Detailed explanation-1: -(a) The amount of heat transferred is directly proportional to the temperature change. To double the temperature change of a mass m, you need to add twice the heat. (b) The amount of heat transferred is also directly proportional to the mass.

Detailed explanation-2: -Rate of heat transfer between two objects Temperature is just a measure of how much thermal energy (sometimes called ‘internal energy’) an object contains. So the greater the temperature difference between an object and its surroundings (air for example), the greater the rate at which heat energy is transferred.

Detailed explanation-3: -The larger the difference in temperature between two objects, the faster heat will transfer from the hotter one to the cooler one. The difference in temperature between two objects is called a thermal gradient (gradient = slope). The steeper the thermal gradient, the faster the flow of heat.

Detailed explanation-4: -The amount of heat transferred is proportional to the temperature difference between the objects and the heat capacity of the object. The heat capacity is a constant that tells how much heat is added per unit temperature rise.

Detailed explanation-5: -When a system absorbs or loses heat, the average kinetic energy of the molecules will change. Thus, heat transfer results in a change in the system’s temperature as long as the system is not undergoing a phase change.