Question

To use the sun, a parametric mirror is used to focus 1 m2 of sunlight onto...

To use the sun, a parametric mirror is used to focus 1 m2 of sunlight onto a well-insulated container that contains 5 liters of water at room temperature (20°C) and 1 atm of pressure. The mirror provides 1368 W of power while the sun is shining, which it provides on average 4.6 hours per day in New Hampshire (during other times the sun is too high or too low to hit the mirror). Note that the specific heat of steam is 1865 J kg ∙ K ⁄ .

a. At the end of an average day, what is the temperature inside the container?

b. If the container were made of steel, as many pressure vessels are, would it be able to contain the heated water vapor?

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