Unit Four Self-Assessment Questions.docx

A ch 3 ch 2 4 ch 3 b cacl 2 c kcl dmgo section five 1

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a) CH 3 (CH 2 ) 4 CH 3 b) CaCl 2 c) KCl d)MgO Section Five 1) Which of the following is not a concept of the kinetic-molecular theory of gases? a) Particles of a gas are in constant motion b) The pressure and volume of a gas in inversely related c) Temperature is a measure of the average kinetic energy of the gas particles d) The particles are very small compared to the distances between them 2) According to the kinetic-molecular theory of gases, a gas particle a) Will collide with another gas particle with no loss of kinetic energy for either b) Will stick to a wall of its container c) Is tiny compared to the volume occupied by the gas d) Repels another gas particle when the two are nearby each other 3) In collisions between gas particles, the total energy a) Decreases slightly b) Decreases considerably c) Increases slightly d) Remains the same
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Unit Four Test on March 10, 2017 Section Six 1) Gas pressure is caused by a) Gas molecules colliding with each other b) Gas molecules colliding with vessel walls c) Gas molecules condensing to form a liquid d) Measurement with a barometer 2) Boyle’s law states that the pressure of a gas is inversely proportional to its a) amount b) mass c) temperature d) volume 3) A gas sample occupies 6.00 L at 2.00 atm pressure. At what pressure would the volume be 1.50 L if the temperature remains constant? a) 0.500 atm b) 8.00 atm c) 9.00 atm d) 12.0 atm 4) In an experiment, as temperature is changed at constant pressure, the volume of a gas is halved. How is the final temperature related to the initial temperature? a) The Celsius temperature is doubled b) The Celsius temperature is halved c) The Kelvin temperature is doubled d) The Kelvin temperature is halved 5) One 1.00-L flask (Flask A) contains NO gas, and another 1.00-L flask (Flask B) contains NO 2 gas, both at STP. Flask A contains a) Less mass and fewer molecules than Flask B b) Less mass but the same number of molecules as Flask B c) Less mass but more molecules than Flask B d) More mass and more molecules than Flask B 6) How many moles are there in 5.60 L of a gas at STP? a) 0.250 mol b) 0.500 mol c) 4.00 mol d) 125 mol Section Seven 1) In the ideal gas equation, PV=nRT, the variable n stands for a) A constant b) The number of atoms c) The number of moles d) The principal quantum number
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Unit Four Test on March 10, 2017 2) At STP, 1.00 mol of an ideal gas occupies 22.4 L. What volume does 1.00 mol of an ideal gas occupy at 20 O C and 1.50 atm? a) 13.9 L b) 22.4 L c) 16.0 L d) 672 L 3) The molar volume of an ideal gas at 2.00 atm and 546 K is a) 5.60 L b) 22.4 L c) 44.8 L d) 89.6 L
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