A mass of 349.7 g with unknown composition is heated in an oven to a temperature

Question

A mass of 349.7 g with unknown composition is heated in an oven to a temperature of 307.71 °C. The mass is then dropped into a strong insulated calorimeter containing 896.5 g of water. The initial temperature of water is 12.49 °C. The final equlibrium temperature of the system is 16.89 °C. Assume that the mass and water are in an isolated system and the water does not vaporize. No heat is transferred to the water during this experiment. The specific heat of the water is 4190 J/kg-K. What is the specific heat of this unknown mass?

Explanation / Answer

heat lost by mass = heat gained by water ,

0.349 * C ( 307.71 - 16.89 ) = 0.8965 *  4190 * ( 16.89 - 12.49 )

C = 162.824 J / kg K <-----------ans

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