Suppose 0.0290 kg of steam (at 100.00°C) is added to 0.290 kg of water (initially at 19.7°C.). The water is inside an aluminum cup of mass 44.7 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.

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The numbers in the question may be slightly different. Many online science class instructors are lazy about coming up with homework and test questions; so they just change the Q&A numbers a little.
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