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18 July, 21:42

A 50 g sample of an unknown metal is heated to 90.0C. It is placed in a perfectly insulated container along with 100 g of water at an initial temperature of 20C. After a short time, the temperature of both the metal and water become equal at 25C. The specific heat of water is 4.18 J/gC in this temperature range. What is the specific heat capacity of the metal?

Record your answer with two significant figures. J/gC

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Answers (2)
  1. 18 July, 21:57
    0
    Q = mcΔT

    Qwater = - Qmetal

    (100 g) (4.18 J/g°C) (25°C - 20°C) = - (50 g) c (25°C - 90.0°C)

    2090 J = (3250 g °C) c

    c = 0.643 J/g °C
  2. 18 July, 22:08
    0
    The correct answer is 0.64 J/g °C ...
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