When 30 g of a metal at 86 ◦C is added to 46 g of water at 23 ◦C, the temperature of the water rises to 32 ◦C. What is the specific heat capacity of the metal? Assume no heat was lost to the surroundings. Answer in units of J g · ◦C

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

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