States of Matter
Specific Heat Capacity
Heat of Fusion and Vaporization
Phase Diagrams and Heating Curves
Gas Laws
100

Which state of matter has the highest potential energy?

Gas

100

What are the units of specific heat capacity?

J/g°C 

100

Is heat of vaporization associated with melting or boiling?

Boiling

100

What phase change is happening at Segment D?


Condensation/Vaporization

100

Convert 55°C to Kelvin

328 K

200

Would a plastic toy float or sink if placed in oil?

Sink

200

A 2 kg block of metal is heated by 10 °C. If the metal’s specific heat is 400 J/(kg·°C), how much energy is absorbed?

8000 J

200

Why does ice absorb heat without changing temperature as it melts?

Energy it absorbs is used to break the attraction between particles rather than to increase their kinetic energy.

200

Which segment, A or D, does the substance have a higher kinetic energy?


D

200

A basketball deflates overnight. Which conditions changed?

Temperature and volume

300

Explain why gases can be compressed but solids cannot.

Gases have lots of empty space → can be compressed; solids have almost no empty space → cannot be compressed.

300

A metal block absorbs 3600 J of heat and its temperature rises by 12 °C. If the mass is 0.3 kg, what is the metal’s specific heat?  

1,000J/(kg °C)

300

How much energy is needed to melt 80 grams of NH3?

110,080 J

300

Why are substances more likely to be solids at high pressures?


High pressure reduces the space between particles, making it harder for them to move freely.

300

Is the relationship between pressure and volume direct or inverse?

Inverse

400

What is the density of the substance based on the following graph?

0.1 g/cm3

400

Based on the table below, which substance corresponds to the Orange line?

Substance B

400

It takes 550,000 J of energy to completely vaporize 16 grams of a substance. What is the heat of vaporization?

34,375 J/g

400

What is the state of matter at a pressure of 50 atm and a temperature of 35°C?


liquid

400

A gas at 2 atm and 300 K is heated to 600 K. What is the new pressure?

4 atm

500

Rank Liquid A, Liquid B, and the solid sample in order of increasing density.

Liquid A, Solid Sample, Liquid B

500

You calculated the energy needed to raise the temperature of a substance and found it to be q. If the change in temperature tripled and the mass was halved, how does q change?

3/2 q

500

Explain why sweating cools the body.

Sweat is mostly water, which absorbs heat from your skin as it evaporates. The heat energy from your body is used to break the attractive forces between water particles so the liquid can turn into a gas.

500

If the temperature decreases from 300K to 250K at a constant pressure of 1atm, what change of state happens? 

Freezing

500

Name a condition under which real gases behave ideally.

Real gases behave most ideally at high temperatures and low pressures.

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