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Question of the Day Question: How could determine if oil or water is more dense? Answer: … … … Turn In: Investigating CO2 Lab Page 1 of Review Sheet

p. 52 CYU 2, 4, 5, 6 State the law of conservation of mass and the law of conservation of energy. 2. The law of conservation of mass states that mass cannot be created or destroyed. The law of conservation of energy states that energy cannot be created or destroyed.

p. 52 CYU 2, 4, 5, 6 Gas: Liquid: Solid: 4. Rank the following in order of increasing strength of forces between molecules: a. honey b. marble c. water d. candle wax e. nitrogen gas The correct order from strongest to weakest forces between molecules is nitrogen gas, water, honey, candle wax, and marble. (e, c, a, d, b) Gas: Liquid: Solid:

p. 52 CYU 2, 4, 5, 6 5. Compare and contrast the shape and volume of solids, liquids, and gases. Solids have a definite volume and a definite shape. Liquids have a definite volume but no definite shape. Gases have neither a definite volume nor a definite shape. 6. Predict which two of the following involve the same energy transfer. Assume that the same substance and the same mass is involved in all four processes. a. Melting b. evaporation c. sublimation d. condensation 6. Evaporation and condensation are opposite processes that involve the same amount of energy transfer.