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Copper metal has a specific heat of 0.385 J/g·°C. Calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0°C to 875°C.

A. 1.97 × 10−5 J
B. 1.0 × 10−2 J
C. 329 J
D. 7.51 kJ
E. 10.5 kJ

2007-11-16 04:42:11 · 1 answers · asked by Anonymous in Science & Mathematics Chemistry

1 answers

Use
dQ = m c dT where dQ = amount of heat, m = mass of sample, c = specific heat, and dT = temperature change

dQ = (22.8gm)*(0.385 J/gm/C)*(875 -20) C

dQ = 7.51x10^3 J = 7.51 kJ ---> D

2007-11-16 04:51:26 · answer #1 · answered by nyphdinmd 7 · 0 0

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