How to calculate energy for 30g Copper Penny to go from 25 degrees C to 100 degrees C in boiling water?

Question

If you throw a copper penny into boiling water, its temperature will increase to 100 degrees C. How much energy is needed to warm a 2.5g copper penny from 25 degrees C to 100 degreesC?

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Answer 1 · 2018-04-19T00:01:29

#qapprox 869 J #

Copper has a specific heat #c# of #0.386 J/(gC^@)#

Using that the heat change in #q# is equal to
#q= mcDeltat#

#q= (30g)(0.386 J/(gC^@))(100^@C-25^@C)#

#q= (30g)(0.386 J/(gC^@))(75^@C)approx 869 J #