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 6.45 g and its initial temperature is 20.2 C. The mass of substance B is 26.1 g and its initial temperature is 52.7 C. The final temperature of both substances at thermal equilibrium is 46.5 C.

come into contact and reach thermal equilibrium. The mass of substance A is 6.45 g and its initial temperature is 20.2 C. The mass of substance B is 26.1 g and its initial temperature is 52.7 C. The final temperature of both substances at thermal equilibrium is 46.5 C.

Part A

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

Explanation / Answer

eat gain = heat loss

CA x mA x TA = - (CB x mB x TB)

CA x 6.45 x (46.5- 20.2) = -( 1.17 x 26.1 x (46.5 - 52.7))

CA = -( 1.17 x 26.1 x (46.5 - 52.7)) / 6.45 x (46.5- 20.2) = 1.116 J / g C

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