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CEM 141 - Chapter 5 Learning Objectives Questions & 100% Verified Correct Answers with complete solutions (Latest update $7.99   Add to cart
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CEM 141 - Chapter 5 Learning Objectives Questions & 100% Verified Correct Answers with complete solutions (Latest update

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CEM 141 - Chapter 5 Learning Objectives Questions & 100% Verified Correct Answers with complete solutions (Latest update

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  • August 15, 2024
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  • 2024/2025
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  • cem 141 chapter 5 learning objectives

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  • Chemistry 141
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CEM 141 - Chapter 5 Learning Objectives
molecular structure - ANS-the temperature at which a phase change occurs depends upon the
____________ of the compound

no, chemical bonds are NOT overcome, intermolecular (IMFS) are overcome - ANS-for
molecular substances, as a substance changes phase, are chemical bonds overcome?

increase; entropy - ANS-the direction of change is determined by an _________ in the total
_________ change

temperature is the measure of "hotness"; tells you in which direction thermal energy (heat) will
move; heat always moves from hot to cold.
thermal energy depends on how much material you have whereas temperature depends on the
average kinetic energy of particles - ANS-explain the difference/relationship between
temperature, thermal energy, and kinetic energy

temperature is directly related to average energy of particles in a gas - ANS-KE = 1/2mv^2
(explain)

the molecules don't stick together because they have enough energy to overcome the attractive
interactions - ANS-when gas molecules collide, why don't they stick together?

molecules collide with each other and therefore don't move in a straight line (this is called
Brownian motion) - ANS-the average speed of H2S molecules is 1000 m/s at 273 K - why
wouldn't we smell it immediately if a container were opened at the back of the auditorium?

free translation, free rotation, free vibration - ANS-translation (moving in one direction), rotation,
and vibration of gas?

restricted translation, rotation less free than gas, free vibration - ANS-translation, rotation, and
vibration of liquid?

absent translation, limited rotation, free vibration - ANS-translation, rotation, and vibration of
solid?

how much energy it takes to change the energy of a substance - ANS-specific heat/heat
capacity

because the IMFs have to be overcome; as energy is added it can increase kinetic energy AND
be used to overcome IMFs in the substance - ANS-why does it take more energy to raise the
temperature of liquid water than of water vapor (steam)?

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