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How much heat is required to increase the temperature of 0.5 kg of water from 10 degree C to 65 degree C? |
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Answer» Mass of the water = 0.5 kgInitial temperature = 10°CFinal temperature = 65°CTo Find :Heat required to increase the temperature.Solution :❖ Specific heat capacity is DEFINED as the heat required to increase temperature of 1 G substance by 1 °CMathematically, Q = m c ∆T» Q denotes heat » m denotes mass» c denotes specific heat capacity» ∆T denotes change in temperatureSpecific heat capacity of water = 1 cal / g °CBy substituting the GIVEN values;➙ Q = m c ∆T➙ Q = 0.5 × 1 × (65 - 10)➙ Q = 0.5 × 55➙ Q = 27.5 calKnowledge BOOSTER :Specific heat capacity of water is very high. This is the reason why water is used as a coolant in automobile radiators as well as a heater in hot water bags.Determination of specific heat or LATENT heat of a substance using principle of calorimetry is good enough provided there is no loss of heat. |
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