IMF Solids Liquids Gases Review AP Chemistry Kinetic

IMF, Solids, Liquids & Gases Review AP Chemistry

Kinetic Energy and Physical States of Matter Identify (include the segment number) the phase changes that occur during the heating curve. For each segment, indicate whether the added heat is being used to break intermolecular forces or increase the kinetic energy of the substance. Why does segment “ 2” require LESS energy than segment “ 4”? Which constants would be required to calculate the heat involved for each segment of the curve?

Intermolecular Forces

Types of Intermolecular Forces

Comparing the 3 States of Matter: Solid, liquid, gas

In general, • The stronger the IMF in a liquid, the more K. E. needed to change it into a gas. • The weaker the IMF, the higher the vapor pressure, and the lower the b. p. of the substance. • A liquid boils when its vapor pressure equals the external pressure acting on the surface of the liquid. • Substances with high vapor pressure (like gasoline) evaporate more quickly than substances with low vapor pressure (like oil). • For heating/cooling curve, the stronger the IMF, the higher the heats of transition (melting, boiling).