Chapter 3 Matter and Energy 1 2 3 4 5 6 7 8 States of Matter Solid Liquid Gas Pure Substances Mixtures Chemical Physical Properties Changes Separation of Mixtures Distillation Filtration Law of Conservation of Mass Energy Temperature Heat Capacity Temperature Changes States of Matter Solid Liquid Gas Filtration Apparatus Distillation Apparatus Example 1 An antacid tablet weighing 0 853 g reacted with an acid solution weighing 56 52 g One of the reaction products was carbon dioxide gas which was observed as a fizz If the resulting solution weighed 57 15 g how many grams of carbon dioxide were produced Answer 0 22 g Example 2 Convert 70 0 F to C and to Kelvins Example 3 If it is 28 C outside would you consider it a warm day or a cold day Example 4 Express absolute zero in units of F C and K Example 5 A brownie contains 320 Calories Express this in calories and in Joules Example 6 How much energy is required to heat 10 0 g of iron from 25 0 C to 100 0 C The specific heat capacity of iron is 0 45 J g C Example 7 A 19 6 g sample of an unknown metal was heated from 22 0 C to 53 8 C by the addition of 558 6 J of energy Find the specific heat capacity of the metal Refer to the table of specific heat capacities in your textbook to predict what metal this might be Example 8 How much energy in joules is needed to heat a cup of water for coffee Assume the following the cup holds 250 mL of water the density of water is 1 00 g mL the water is initially at 19 C the ideal temperature for brewing coffee is 97 C Answer 81 6 x 103 J
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