Q CHM 1032 Focus Concept Problems: Matter and Energy Name _________________________ Date_____________________________ Directions: read the following questions and answer accordingly. Show all mathematical work. (1) Classify each of the following as a pure substance or a mixture: (a) Bacon and Egg Sandwich (b) Salt (NaCl) (c) Ethane (C2H6) (d) A fruit drink (2) Classify the following mixture as homogeneous or heterogeneous: (a) Chicken noodle soup (b) Coffee (c) Carrot salad (d) Seawater (3) Identify the following as a physical or chemical property: (a) Copper is a reddish-orange solid. (b) Magnesium reacts with oxygen to produce magnesium oxide. (c) An infant has a temperature of 41.3 0C. (d) The souring of Milk. (e) Hydrogen gas reacts with oxygen gas to form water. (4) Determine whether the following statements describes potential or kinetic energy: (a) Cheese sandwich (b) A hurricane (c) A tightly wound spring (d) A car speeding down the highway (5) Convert the following temperatures: (a) 35oC to _______ oF (b) 165oC to _______ K (c) 120oF to _______oC (6) Usain Bolt used 850 kcal on a long walk. Calculate the energy he used for the walk in the following units: (a) Joules (b) Kilojoules (7) A high-protein diet contains 72.0-g of carbohydrate, 6.0-g of fat, and 160-g of protein. How much energy, in kilocalories, does the diet provide (round to the nearest tens place). (8) How many kilocalories are lost when 580-g of water cools from 67oC to 22oC? (9) In a freezer, 160-g of water at 0oC is placed in an ice cube tray. How much heat, in kilocalories, must be removed to form ice cubes at 0oC?