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19 Nov 2019

The heating curve shown was generated by measuring the heat flow and temperature for a solid as it was heated. What corresponds to the heat capacity of the gas?

a the slope of segment AB
b the length of segment BC
c the slope of segment CD
d the length of segment DE
e the slope of segment EF

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Keith Leannon
Keith LeannonLv2
29 Oct 2019

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question 1) Propane for home heating is sometimes purchased by the pound, where the tank is weighed before delivery and again after the customer has finished using it. Which quantity or quantities are constant in this situation?

a.) n

b.) V

c.) T

d.) P

e.) none of these

QUESTION 2) Pressure is defined as force per unit area, and it is affected by
I. the number of collisions between molecules and the walls of the container.
II. the force of the collisions between molecules and the walls of the container.
III. the strength of the attractions between the molecules of the gas.
IV. the strength of the attractions between the molecules of the gas and the walls of the container.

a.) I and II only

b.) III and IV only

c.) I and III only

d.) none of these

e.) all of these

QUESTION THREE) On a warm spring afternoon, you enter the lab, put on your safety glasses, and open a bottle labeled Γ’Β€Βœpure acetic acid.Ҁ In addition to the liquid you observe a strong odor of vinegar. Which phases of matter are present in the container?

a.) gas only

b.) solid, liquid and gas

c.) liquid and gas

d.) gas and solid

e.) solid and liquid

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