OCS 1005 : Test 2 Notes/Review
15 Mar 2019
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Document Summary
Water molecules are attacked to each other due to hydrogen bonds: surface tension, cohesion- stick to each other, adhesion- stick to other substances. Sodium + chloride : bonded by ionic bonds, water molecules stick to other polar molecules, water dissolve anything except oil because it is non-polar, hydration. Thermal properties of water: adding/removing heat is what changes its state of matter, gas, molecules freely moving, liquid, hydrogen bonds breaking and reforming, solid, density is highest. Heat: molecules moving and connected, generating heat, how many and how rapidly. Higher temp? candle: molecules vibrate very rapidly but are few molecules that does this. Molecules vibrate more slowly but are many of them. Heat capacity: amount of hear required to raise the temp of 1 gram, water has high heat capacity w/o changing temp, water has high latent heats, ice to liquid 80 cal/g, temp 0-100 starts making vapor.
