e3pf09 - 0 Graphite is thermodynamically less stable that...

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0. Graphite is thermodynamically less stable that diamond under standard conditions. 1. True 2. False 1. Which statement would be the best interpretation of the First Law of Thermodynamics? 1. The total amount of energy in the universe is increasing. 2. The total amount of entropy in the universe is increasing. 3. The total amount of energy in the universe is constant. 4. The total amount of matter in the universe is constant. 2. Enthalpy (H) is best defined by which of the following statements? 1. the capacity of a system to influence the entropy of its surroundings 2. pressure-volume work 3. a measure of a system's energetic degeneracy 4. none of these describe enthalpy 3.1. Water changing from a solid to a liquid is 1. an endothermic change. 2. an exothermic change. 3. Neither an exothermic or an endothermic change 3.2. Heat flow is considered positive when heat flows (into, out of) a system; work is considered positive when work is done (by, on) a system. 1. out of; by 2. into; on 3. out of; on 4. into; by 4. Definition: state functions An extensive state function's value is (dependent on/independent of) the amount of a given substance. An intensive state function's value is (dependent on/independent of) the amount of a given substance. 1. dependent on, dependent on 2. independent of, independent of 3. dependent on, independent of 4. independent of, dependent on 5. What is the enthalpy change for ΔH° f C(s,graphite)? 1. −1300 kJ/mol 2. 31 kJ/mol 3. 717 kJ/mol 4. 0 kJ/mol 5. −575 kJ/mol 6. Consider the following specific heats: copper, 0.384 J/g·°C; lead, 0.159 J/g·°C; water,4.18J/g·°C; glass, 0.502 J/g·°C. If the sameamount of heat is added to identical masses of each of these substances, which substance attains the highest temperature? (Assume that they all have the same initial temperature.) 1. lead 2. water 3. glass 4. copper 7.1. You set up a bomb calorimetry experiment using 1 liter of water as your heat sink and

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combusting a 4.409 g sample of propane (C 3 H 8 ). If the initial and final temperature are 24.90 °C and 77.96 °C respectively, what is the approximate molar enthalpy of combustion of ethene? (Assume the calorimeter itself absorbs no heat. Assume the density of water is 1 g·mL -1 ) 1. −222.0 kJ · mol−1 2. −222, 000 kJ · mol−1 3. −22.20 kJ · mol−1 4. −22, 200 kJ · mol−1 5. −2, 220 kJ · mol−1 7.2. A 0.10 g piece of chocolate cake is combusted with oxygen in a bomb calorimeter. The temperature of 4,000 g of H 2 O in the calorimeter is raised by 0.32 K. (The specific heat of the water is 1.0 cal/g·K and the heat of vaporization of water is 540 cal/g.) What is ΔE for the combustion of chocolate cake? Assume no heat is absorbed by the calorimeter. 1. −460 kcal/g
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e3pf09 - 0 Graphite is thermodynamically less stable that...

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