1. When doing gas law problems, we always use the ____________ temperature scale

ID: 830312 • Letter: 1

Question

1. When doing gas law problems, we always use the ____________ temperature scale.

2. -42oC equals _______ K.

3. If I dissolve one teaspoon of sugar in a glass of water, the solute is the __________.

4. The boiling point of a liquid can be decreased by decreasing the pressure above the

liquid - the atmospheric pressure. (True / False)

5. If two liquids dissolve in each other in all proportions, they are said to be __________ .

(miscible / immiscible).

6. What is the molarity of a solution prepared by dissolving 4.92 g of calcium nitrate,

3 2 32 Ca(NO ) , in 250 mL of water? (The molar mass of Ca(NO ) is 164 g/mol.)

7. The energy required to change one mole of a liquid to one mole of a gas at constant

temperature and pressure is called .

8. The volume of an ideal gas is 2.06L at standard temperature and pressure. Calculate the

volume at 1.75 atm and 27oC.

9. What volume (in liters) is occupied by 0.01 moles of carbon monoxide, CO, at 9oC and

0.973 atm?

10. Ethane, C2 H6 , has a molar heat of vaporization of 15 kJ/mole. How many kilojoules or

energy are required to vaporize 5 g of ethane?

11. When something is volatile, it evaporates readily. Do volatile liquids have high or low

vapor pressures?

Kelvin 231 sugar true miscible 0.12 heat of vapourization 1.29 0.237 2.5 kJ high VP

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