Key Question #12

# Key Question #12 - greater amount of water available 57 The...

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Lesson 12 Key Questions 55) a) The reaction rates are equal in a dynamic equilibrium. The concentration of reactants and products remain constant over time due to forward and reverse reactions occurring simultaneously. b) In a dynamic equilibrium state the forward and reverse reactions are equal and no visible changes are seen in observable properties. c) When a system is at equilibrium the energy state and entropy are in conflict. The urge toward maximum entropy against the drive to minimum energy. A system in equilibrium represents a compromise between these two opposing tendencies. 56) a) PV=nRT = [(5g / 18g) x (8.31) x (293K)] / 1L = 676.3 pascals c) PV=nRT = [(15g / 18g) x (8.31) x (303K)] / 2L = 1049.1 pascals c) PV=nRT = [(500g / 18g) x (8.31) x (298K)] / 3L = 22929.4 pascals By using the universal gas law it shows that C) a 3 L container with 500 mL of water at 25 o C would have the greatest vapour pressure largely due to a

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Unformatted text preview: greater amount of water available. 57) The atmospheric pressure is lower as you increase in altitude. This causes the water to start boiling at a lower temperature compared to sea-level. By seeing water that is boiling at an elevated altitude it may give the impression that you egg is being cooked at normal temperature when in fact it is not. 58) a) Randomness is increased. b) Minimum energy would favour the separated pure substances. c) The two substances are completely miscible since an equilibrium has been formed between the systems drive towards minimum energy and the drive towards maximum randomness. 59) At the lower pressure it is easier to remove the moisture or water in the coffee bean. Without the water inside it has a longer shelf life. 60) b) Evaporation of the liquid continues. 61) d) The system is cooled. 62) ii) (a), (b) and (d) only....
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Key Question #12 - greater amount of water available 57 The...

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