Two substances, A and B, initially at different temperatures, come into contact

Question

Two substances, A and B, initially at different temperatures, come into contact and reach thermal equilibrium. The mass of substance A is 6.39g and its initial temperature is 20.2?C. The mass of substance B is 25.2g and its initial temperature is 52.2?C. The final temperature of both substances at thermal equilibrium is 46.2?C.

Part A

If the specific heat capacity of substance B is 1.17 J/g??C, what is the specific heat capacity of substance A?

Express your answer using two significant figures.

Explanation / Answer

mACA(T2A - T1A) = mBCB(T2B - T1B?)

(6.39g)(X)(46.2 - 20.2)

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