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45.8 grams of copper requires 1172 J of heat to reach a final temperature of 100.5 ℃. What was the initial temperature? The specific heat of copper is 0.385 J/g℃.

A. 66.5 ℃
B. 122 ℃
C. 34.0 ℃
D. 75.2 ℃

Answer :

Answer:

Option A, 66.5

Explanation:

use q (heat) = m(mass) * cp(specific heat) * deltat (change in temp)

q= 1172, m = 45.8, cp = 0.385

1172= (45.8) * (0.385) * Delta T

1172= 17.633 *DeltaT

1172/17.633 =DeltaT

66.5 =DeltaT

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