Chem - Phases

What factor is most likely to cause a phase change?

• Electrons

• Protons

• Temperature

• Metals

What forces keep molecules together?

• Intermolecular forces

• Bonding

• Protons and Neutrons

• Electrons

Molecules that are more "attracted" to one another are

• More polar

• Less polar

• Nonpolar

• Subpolar

If CO₂ has a freezing point of -80ºC, is it more polar or less polar than water? (Freezing pt = 0º)

• More polar

• Less polar

• The same

If methane has a freezing point of -182ºC, is it more polar or less polar than water? (Freezing pt = 0º)

• More polar

• Less polar

• The same

If ammonia has a freezing point of -78ºC, is it more polar or less polar than acetone? (Freezing pt = -95º)

• More polar

• Less polar

• The same

If water has a freezing point of 0ºC, is it more polar or less polar than ethanol? (Freezing pt = -114º)

• More polar

• Less polar

• The same