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March 26, 2017

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Suppose 0.0150 kg of steam (at 100.00°C) is added to 0.150 kg of water (initially at 19.3°C.). The water is inside a copper cup of mass 54.1 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the final temperature (in °C) of the water after equilibrium is reached.

  • physic - ,

    The sum of the heats gained is zero.

    Heatcodensingsteam+heatcondensedsteamTofinalTemp+heatwater to finaltemp+heatcopper to finaltemp=0

    Heat gained condensing steam=-.00150*Hv the sign is negative because heat is LOST.

    Heat gained by condensed steam=.0150(cw)(Tf-100)
    Heat gained by heated water=.150*Cw*(Tf-19.3)
    Heat gained by copper=.054(Ccu)(Tf-19.3)

    add all these, set to zero, and solve for Tf.

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