OCS 1005 Chapter : Ch 5 Homework
15 Mar 2019
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Document Summary
Water melts and boils at relatively high temperatures, because additional heat is required to overcome the hydrogen bonds and van der waals forces. Pure water has a high specific heat capacity that is exactly 1 calorie per gram, whereas other common substances have much lower specific heats. Metals, like iron and copper have a heat capacity values that are about 10 times lower than water. The huge amount of heat energy exchanged in the evaporation-condensation cycle helps make life on earth possible. The latent heat of melting is the energy needed to break the intermolecular bonds that hold water molecules rigidly in place in ice crystals. The temperature remains unchanged until most bonds are broken and the mixture of ice and water has changed completely to 1 gram of water.
