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Assume all temperatures to be exact. A 0.25-kg glass cup at 27?C is filled with 0.43kgof...

Assume all temperatures to be exact.
A 0.25-kg glass cup at 27?C is filled with 0.43kgof hot water at 81?C.   Neglecting any heat losses to the environment, what is the equilibrium temperature of the water? C { the specific heat of glass is 840 j/kg/.c}

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Answer #1

Note that

Qglass + Qwater = 0

Thus,

mglass cglass (Tf - 27) + mwater cwater (Tf - 81) = 0

Solving for Tf,

Tf = 75.36 degrees C   [ANSWER]

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