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Explain how the specific heat capacity of a solid can be determined (measured) by the method of mixture. |
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Answer» Solution :A hot solid is put in water in a calorimeter. The mixture is stirred continuously and the maximum TEMPERATURE of the mixture is measured with a thermometer. HEATEXCHANGE between the hoysolid, water and calorimeter RESULTS in all bodiesattainingthe sametemperature after some time. Hence, according to the principle of heat exchange, heat lost by the solid = heat gained by the water in the calorimeter + heat lost by the solid = heatgained by the water in the calorimeter + heat gained by the calorimeter. Now, heat lost by the solid (Q) = mass of the solid ` xx ` its specific heat CAPACITY ` xx` DECREASE in its temperature m heat gained by the water `(Q_(1))`= massof the water ` xx ` its specific heat capacity ` xx` increase in its temperature and heat gained by the calorimeter ` (Q_(2))`=mass of the calorimeter `xx` its specific heat capacity ` xx` increase in its temperature . Heat lost by the hot object= heat gained by the calorimeter + heat gained by the water . ` = Q_(2) + Q_(1)` Usingthis equation , the specific heat capacity of the solid can be determined (measured ) when the other quantities are known. |
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