Question

1. which point on the graph represents a gas?
2. the picture below represents what type of intermolecular force?
3. which of the following is true about heat?
4. which state of matter has the lowest amount of intermolecular attraction?
5. which of the following is true about condensation?

Explanation:

• Question 6: In a heating curve, the gas state is represented after the substance has completely vaporized. Point E is after the phase - change from liquid to gas (the second plateau).
• Question 7: London Dispersion forces are due to temporary dipoles. Hydrogen bonds are a special type of dipole - dipole interaction (but require H - N, H - O, or H - F bonds). Dipole - Dipole forces are between permanent dipoles. Since these are temporary dipoles, it's London Dispersion.
• Question 8: Heat energy flows from a warmer object to a cooler object according to the second law of thermodynamics.
• Question 9: In gases, the molecules are far apart and have the weakest intermolecular attractions compared to solids (strongest) and liquids (intermediate).
• Question 10: Condensation is the process where a gas turns into a liquid. A liquid to solid is freezing, gas to solid is deposition, and a solid heating up is just a temperature change (if it's below melting point) or melting (if it reaches melting point).

Answer:

1. e) E
2. c) London Dispersion
3. a) Heat energy flows from warmer object to cooler object
4. c) Gas
5. b) Its when a gas turns to a liquid