Chemistry

106 g of iron at 84.0°C are placed in contact with 205 g of silver at 11.0°C. If no heat is lost to the surroundings, what is the final temperature of the metals? The specific heat of iron is 0.418 J/g·°C and that of silver is 0.251 J/g·°C.

92.0 g of a metal at 92.0°C are added to 53.0 g of water at 30.6°C. When the system reaches constant temperature, the temperature is 38.7°C. What is the specific heat of the metal? The specific heat of water is 4.184 J/g·°C.

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  1. heat lost by Fe + heat gained by Ag = 0
    [mass Fe x specific heat Fe x (Tfinal-Tintial)] + [mass Ag x specific heat Ag x (Tfinal-Tinitial)] = 0

    Substitute and solve for Tfinal.
    The second problem is worked the same way.

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