Exam 4-1.4

# Exam 4-1.4 - Heat of vap. of H 2 O = 2260 J/g A. 6.43 x 10...

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Sample Exam 4-1 Dr. V. Williamson © Vickie M. Williamson 2007, All Rights Reserved 10. Increasing the amount of liquid in a closed container will cause the vapor pressure of the liquid to: A. depends on the liquid B. increase C. remain the same D. decrease 11. You need to heat a reaction to 108.0°C in a sealed steam chamber, but are not sure your research grant can afford it due to the cost of a joule of heat. Calculate the amount of heat (in joules) required to convert 92.5 g of water at 25.0°C to steam at 108.0°C Sp. Heat of H 2 O(s) = 2.09 J/g * °C Sp. Heat of H 2 O(l) = 4.18 J/g * °C Sp. Heat of H 2 O(g) = 2.03 J/g * °C Heat of fusion of H 2 O = 333 J/g
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Unformatted text preview: Heat of vap. of H 2 O = 2260 J/g A. 6.43 x 10 5 J B. 2.09 x 10 5 J C. 3.05 x 10 4 J D. 2.40 x 10 5 J E. 2.90 x 10 4 J 12. A sample of gas measures 4.22 L at 120°C and at 900 mmHg. What volume would it occupy at STP? A. 7.19 L B. 2.48 L C. 5.13 L D. 4.22 L E. 3.47 L 13. If 1 L of a gas at 30°C and 720 mmHg has a mass of 2.00 g, the mass of one mole of the gas is: A. somewhere between 22.4 and 44.8 g. B. 44.8 g. C. more than 44.8 g. D. 22.4 g. E. less than 22.4 g 14. Which pair of substances is correctly arranged with the highest boiling point first? A. AsH 3 , NH 3 B. O 2 , CF 4 C. C 6 H 6 , CH 3 OH D. CaO, KF E. H 2 S, H 2 O...
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## This note was uploaded on 02/18/2012 for the course CHEM 101 taught by Professor Williamson during the Fall '08 term at Texas A&M.

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