Chapter 4 HEAT4.2 Specifc Heat CapacityLearning outcomesdefne specifc heat capacity state thatdetermine the specifc heat capacity of a liquid.determine the specifc heat capacity of a solid.4.2 Specifc Heat Capacity mQc =A pail of water from a swimming pool has been left beside the pool by some children in the morning. 4.2 Specifc Heat CapacitySituation 1At noon, a lifeguard puts one hand into the water of the swimming pool and the other hand into the pail of water. 4.2 Specifc Heat CapacitySituation 1He observes that the water temperature are diferent4.2 Specifc Heat CapacitySituation 1!qual masses of water and coo"ing oil are heated with similar #ame.4.2 Specifc Heat CapacitySituation 2$he temperature of one will increase faster than the other.4.2 Specifc Heat CapacitySituation 2%iferent heat capacity4.2 Specifc Heat CapacityConclusion%iferent specifc heat capacity&hen an ob'ect is heated, its temperature increases as the heat energy absorbed increases the "inetic energy of the molecules and ma"es the molecules move faster.4.2 Specifc Heat CapacityHowever, the increase in temperature depends on$he quantity of the heat absorbed$he mass of the ob'ect&hat the ob'ect is made of4.2 Specifc Heat CapacityHeat Capacity, CHeat capacity, C is defned as the amount of heat energy needed to increase the temperature of an ob'ect by ()*. $he unit for heat capacity is + )*,(.4.2 Specifc Heat Capacity4.2 Specifc Heat Capacity$hey have diferent heat capacities because the masses are diferent.4.2 Specifc Heat Capacity*ompare-pills a spoonful of hot soup and spills the whole content of the bowl of hot soup on your body.4.2 Specifc Heat Capacity$he hot soup in the bowl is said to have a larger heat capacity$he LA./!. the mass of a body, the LA./!. its heat capacitySpecifc Heat Capacity, c-pecifc heat capacity, c of a substance is the quantity of heat energy required to increase the temperature of 1 kg of the substance by ( o* or ( 0.$he unit is + "g,( )*,( or + "g,( 0,( . 4.2 Specifc Heat Capacity4.2 Specifc Heat Capacity1 and * are made from diferent materials, hence diferent specifc heat capacity.4.2 Specifc Heat Capacity$he formula that relates heat energy, Q to specifc heat capacity, c is2 = mc Q*hange in temperature4.2 Specifc Heat CapacityHeat Absorbed vs Heat .eleased = mc Q&hen the temperature increases by 34* 5from t( 4*to t6 4* 7, it GAINS an amount of heat energy. Heat is ABSORBE. 4.2 Specifc Heat CapacityHeat Absorbed vs Heat .eleased = mc Q&hen the temperature decreases by 34* 5from t6 4*to t( 4* 7, it RE!EASES an amount of heat energy. Heat is RE!EASE. 4.2 Specifc Heat Capacity89(:; + is required to raise the temperature of ( "g of water by ( 4*.4.2 Specifc Heat Capacity! ? c for Hg @ (9) + "g,( )*,( A4.2 Specifc Heat Capacity!