2018S_CHEM107_E01_STUDYGUIDE.pdf - EXAM-1 REVIEW GUIDE...

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EXAM-1 REVIEW GUIDE CHEM107 Name: __________________________ Date: _____________ 1. A 2.00-L glass soda bottle filled only with air is tightly capped at 23°C and 734.0 mmHg. If the bottle is placed in water at 75°C, what is the pressure in the bottle? A) 2390 mmHg D) 389 mmHg B) 624 mmHg E) 225 mmHg C) 863 mmHg
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2. Which of the following pure substances has the lowest normal boiling point? 2 S
3. What is the name for the following phase change? I 2 ( s ) I 2 ( l )
4. The density of O 2 gas at 2°C and 1.27 atm is
5. Which substance involves no bonding forces except London dispersion forces? A) N 2 ( l ) B) K( s ) C) NaCl( l ) D) H 2 O( l ) E) HF( l )
6. The boiling points of chloromethane (CH 3 Cl) and dichlormethane (CH 2 Cl 2 ) are 24 °C and 40.°C respectively. The boiling point of trichloromethane (CHCl 3 ) is predicted to be: 24 °C
7. The specific heat of liquid ethanol, C 2 H 5 OH( l ), is 2.46 J/g·°C and the heat of vaporization is 39.3 kJ/mol. The boiling point of ethanol is 78.3 °C. What amount of enthalpy is required to heat 50.0 g of liquid ethanol from 23.0 °C to ethanol vapor at 78.3 °C?
8. Which compound has the lowest standard enthalpy of vaporization at 25°C?
9. How much energy (heat) is required to convert 25.5 g of H 2 O(l) at 35.0°C to H 2 O(g) at 115.0°C? specific heat of ice: 2.09 J/g·°C H fus = 6.02 kJ/mol specific heat of water: 4.18 J/g·°C H vap = 40.7 kJ/mol specific heat of steam: 1.84 J/g·°C A) 9,130 J B) 7,630 J C) 8,530 J D) 65,200 J E) 207 J
10. When the valve between the 2.00-L bulb, in which the gas pressure is 4.50 atm, and the 3.00-L bulb, in which the gas pressure is 2.00 atm, is opened, what will be the final pressure in the two bulbs? Assume the temperature remains constant.

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