Question

Which of the following changes would increase the vapor pressure of a liquid?

            i.   An increase in temperature

            ii. An increase in the intermolecular forces in the liquid

            iii. An increase in the size of the open vessel containing the liquid

a)         i and ii only

b)         i and iii only

c)         i only

d)         ii only

e)         iii only

If the rate of evaporation from the surface of a liquid exceeds the rate of condensation, _____.

            a)         the system is in equilibrium

            b)         the liquid is boiling

            c)         energy as heat is no longer available

            d)         the concentration of the vapor is increasing

            e)         none of the above

A solid forms when the average energy of a substance's particles _____.

            a)         increases        

            b)         decreases then increases

            c)         decreases        

            d)         creates a random arrangement

Answer 1

1) Which of the following changes would increase the vapor pressure of a liquid?

i) An increase in temperature

ii) An increase in the intermolecular forces in the liquid

iii) An increase in the size of the open vessel containing the liquid

Answer) i only

2) If the rate of evaporation from the surface of a liquid exceeds the rate of condensation.

Answer) d) the concentration of the vapor is increasing.

3) A solid forms when the average energy of a substance's particles.

Answer) c) decreases