Test - Unit 2 Matter

• Which of the following will speed up the dissolving of a solid in water? A. Cool the solution B. Grind up the solvent C. Freeze the solute D. Stir the solution

• A flask containing molecules of gas A and a separate flask containing molecules of gas B are both at the same temperatures. Gases A and B must have equal A. Volumes B. Masses C. Pressures D. Average kinetic energy

• When two or more substances are physically combined the result is a __________ A. Chemical Change B. Element C. Compound D. Mixture

• Which term best describes when particles escape from the surface of a liquid and become gaseous? A. Sublimation B. Evaporation C. Vaporization D. Deposition

• The particles of a liquid are usually A. Closer together and lower energy than a solid B. Farther apart and lower energy than a solid C. Farther apart and higher energy than a gas D. Closer together and lower energy than a gas

At what temperature is the solubility of KBr the same as that of KNO3?

• Label the five parts of a heating curve.

D = 16.25g/12.7 mL

Name one similarity between compounds and homogeneous mixtures, name one difference.