Chemistry Quiz 6

Quiz 6 Energy and States of MatterPotential energy is energy that Your answer:is stored.is found in the chemical bonds of foodcan be converted to kinetic energyall of the aboveThe temperature of 85oF on the Celsius temperature scale is Your answer:29 oC47 oC53 oC67 oCOn the Fahrenheit scale, the temperature of -5oCelsius is Your answer:-9 oF23 oF27 oF41 oFOne kilocalorie is Your answer:1000 caloriesthe same as a nutritional Caloriea unit of heatall of the aboveThe specific heat of aluminum is 0.22 cal/goC. The number of calories required to heat 25 g of aluminum from 12oC to 28oC is Your answer:42 calories400 calories88 calories150 caloriesThe number of kcal released when 85g of water cools from 92oC to 32oC is Your answer:7.8 kcal2.7 kcal21 kcal5.1 kcalHow many joules are required to heat 12 g of water from 4oC to 68oC? Your answer:820 J3400 J3200 J200 JHow many kilocalories are obtained from one serving of chips ( about 12 chips) if one serving contains 7 g of fat, 18 g of carbohydrate, and 2 g of protein? Your answer:140 kcal240 kcal60 kcal80 kcalAt 0oC, the calories needed to freeze 120 g of water is Your answer:9600 cal0 cal120 cal1.5 calThe rate of a reaction can be increased by Your answer:decreasing the temperatureusing less reactantusing a catalystall of the aboveA reaction is exothermic if Your answer:the energy level of the products is higher than that of the reactantsenergy is releasedincreasing the temperature shifts the reaction to the productsall of the aboveConsider the reaction H2 + Cl2 = 2HCl + 44 kcal Which of the following will shift the equilibrium towards the products? Your answer:add H2remove Cl2add HClincrease the temperatureConsider the reaction H2 + Cl2 = 2HCl + 44 kcal Which of the following will shift the equilibrium towards the reactants? Your answer:remove HCllower the temperatureremove Cl2add H2A sample of 15 g of water at 68oC is heated to 100oC and converted to gas. The number of calories required is Your answer:9600 cal8100 cal8600 cal480 calConsider the reaction PCl5 + 16 kcal = PCl3 + Cl2. Your answer:The reaction is endothermic.The equilibrium will shift to products when heat is added.The equilibrium will shift to reactants if Cl2 is added.All of the aboveQuiz 6 Energy and States of Matter Answers1) Potential energy is energy that Correct Answer: all of the above2) The temperature of 85oF on the Celsius temperature scale is Correct Answer: 29 oC3) On the Fahrenheit scale, the temperature of -5oCelsius is Correct Answer: 23 oF4) One kilocalorie is Correct Answer: all of the above5) The specific heat of aluminum is 0.22 cal/goC. The number of calories required to heat 25 g of aluminum from 12oC to 28oC is Correct Answer: 88 calories6) The number of kcal released when 85g of water cools from 92oC to 32oC is Correct Answer: 5.1 kcal7) How many joules are required to heat 12 g of water from 4oC to 68oC? Correct Answer: 3200 J8) How many kilocalories are obtained from one serving of chips ( about 12 chips) if one serving contains 7 g of fat, 18 g of carbohydrate, and 2 g of protein? Correct Answer: 140 kcal9) At 0oC, the calories needed to freeze 120 g of water is Correct Answer: 9600 cal10) The rate of a reaction can be increased by Correct Answer: using a catalyst11) A reaction is exothermic if Correct Answer: energy is released12) Consider the reaction H2 + Cl2 = 2HCl + 44 kcal Which of the following will shift the equilibrium towards the products? Correct Answer: add H213) Consider the reaction H2 + Cl2 = 2HCl + 44 kcal Which of the following will shift the equilibrium towards the reactants? Correct Answer: remove Cl214) A sample of 15 g of water at 68oC is heated to 100oC and converted to gas. The number of calories required is Correct Answer: 8600 cal15) Consider the reaction PCl5 + 16 kcal = PCl3 + Cl2. Correct Answer: All of the above