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April 21, 2014

Homework Help: Chemistry (PLEASE HELP ME)

Posted by Angel on Thursday, October 13, 2011 at 1:30pm.

1. According to the phase diagram for water, how is the state of water determined?

a. proceed up a vertical line at any given temperature

b. read the phase at the intersection of any given temperature and pressure

c. at a given pressure, proceed horizontally to the S-L or L-G line

2. Temperature is a direct measurement of the energy contained in a substance.

a. True
b. False

3. Why does an evaporating liquid cool down, according to the Kinetic Molecular Theory?

a. Heat is required to evaporate a liquid.
b. Heat is lost through elastic collisions.
c. The highest velocity molecules are lost.
d. Heat must be dissipated to break the liquid bonds.

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