H10_4-6-10 - H10: Condensing steam latent heat of...

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H10: Condensing steam – latent heat of vaporization Materials: hot plate with rod and flask clamp, Erlenmeyer flask with attached rubber hose, large Styrofoam cup, can to secure cup, scales, temperature probes Initial definitions and givens: latent heat of vaporization (L v ) - the number of calories required to change one gram of a substance from a liquid to a gas at its boiling point. It’s also equal to the number of calories released when one gram of a substance condenses from a gas to a liquid. L v = 540 cal/g for water Initial Instructions and questions: Warning: Steam and hot water can cause serious burns! The hot plate is slow to warm up, but it and the flask get very hot and stay hot for a long time after the hot plate is turned off. Only heat the water when the flask is held stable by the clamp. Be careful that the cup is stable inside the heavy can, and the hose reaches to the bottom of the cup. When the experiment is over, don’t try to remove the flask from its clamp. The hose will also be hot.
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H10_4-6-10 - H10: Condensing steam latent heat of...

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