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The specific heat of copper metal is 0.385 J/(g × °C). How much energy must be added to a 35.0 gram sample of copper to change the temperature from 20.0°C to 65.0°C?

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Below are the choices:

A. 270 J 

B. 606 J 

C. 809 J 

D. 1130 J 

Below is the solution:

 q = mC∆T 
where: 
q = heat 
m = mass of substance = 35.0 grams 
C = 0.385 J/g*C 
∆T = change in temperature = 65C - 20C = 45C 

q = (35.0 g)*(0.385 J/g*C)*(45C) = 606 J 

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