Tro - Chapter 17

Tro Chapter 17 - 17.1(a What is a spontaneous process(b What is a nonspontaneous process 17.2 Is a process that takes place very slowly a

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17.1 (a) What is a spontaneous process? (b) What is a nonspontaneous process? 17.2 Is a process that takes place very slowly a spontaneous or a nonspontaneous process? Explain your answer. 17.3 What does the symbol “Δ" represent? 17.4 State the First Law of Thermodynamics. 17.5 What is the relationship between the change in the internal energy, heat, and work? 17.6 (a) What is the sign of the enthalpy change for an exothermic process? (b) What is the sign of the enthalpy change for an endothermic process? 17.7 Determine how much the internal energy changes is each of the following cases. (a) A balloon pops and the released gas expands, without any significant heat exchange, and does 145 Joules of work on the surroundings. (b) A pan containing water is heated on a stove and absorbs 2250 Joules of heat. (c) A sample of argon gas is compressed. The sample has 475 Joules of work done on it, and 225 Joules of heat energy are removed from the sample.
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Predict whether each of the following processes is spontaneous or nonspontaneous. (a) Charcoal ignites. (b) Opening a bottle of household ammonia spreads the odor throughout the room. (c) The N 2 in the air all move towards the ceiling of the room. (d) A "dead" battery in a calculator is replaced. (e) Gasoline vapor/air mixtures ignite when exposed to an electrical spark. (f) When table salt is added to hot water it dissolves. 17.9 Predict whether each of the following processes is spontaneous or nonspontaneous. (a) Ice cubes melt at -15°C at standard pressure. (b) Milk mixes in a cup of hot coffee. (c) Chlorine molecules separate into chlorine atoms under standard conditions. (d) When shaken, salad oil mixes with vinegar. (e) Carbon dioxide gas reacts with water vapor under standard conditions to produce oxygen gas and natural gas (methane). 17.10 (a) How are the entropy values of solids, liquids, and gases relate? (b) When water freezes, is the entropy change positive or negative?
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This note was uploaded on 04/14/2008 for the course CHEM 134 taught by Professor Langley during the Spring '08 term at SFASU.

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Tro Chapter 17 - 17.1(a What is a spontaneous process(b What is a nonspontaneous process 17.2 Is a process that takes place very slowly a

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