Question

A sample of nickel is heated to 95.0°C and placed in a coffee-cup calorimeter. If the 50.0 g of water in the calorimeter is initially 22.3°C and warms to 25.4°C, what mass of nickel was heated? (The specific heat of nickel is 0.444 J/°C g and water is 4.18 J/°C g).

A. 15.4 g
B. 57.5 g
C. 2.1 g
D. 21.0 g
heat lost by Ni + heat gained by H2O = 0

[mass Ni x specific heat Ni x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x )Tfinal-Tinitial)] = 0

Substitute and solve for the only unknown, mass Ni.

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