Warm up What information does the chemical formula below tell you. What information does the chemical formula below tell you. CaSO 4 (aq)

Chapter 2 Activity 2 Page 110 States of Matter: Solid, Liquid, and Gases WDYT? WDYT? –Draw three circles. In the first circle, draw what you think particles of material look like in the solid state. In the next circle, draw the particles of the same material as a liquid. In the final circle, illustrate the same material as a gas.

Investigation You have 20 minutes to complete Part A and B You have 20 minutes to complete Part A and B –Check the temperature every 30 seconds not every min.

Chemistry in Activity Chem Saver page 16 Heating and Cooling Curve Time 0oC0oC0oC0oC 100 o C Solid melting freezing liquid Boiling/vaporization condensation Gas/vapor Heat of fusion Heat of vaporization  KE  PE

Warm up The graph below shows a heating-cooling curve for a substance. During which segment is the substance melting? The graph below shows a heating-cooling curve for a substance. During which segment is the substance melting? a) segment BC b) segment EF c) segment DE d) segment AB

Chemistry in Activity Chem Saver Page 41 Equations Equations –Q = m × c ×  T (for problems involving changes in temperature) –Q = m × H fusion or Q = m × H vaporization (for problems involving phase changes) Q = amount of heat absorbed or released Q = amount of heat absorbed or released m = mass of substance m = mass of substance c = specific heat of the substance c = specific heat of the substance ΔT = Temperature Change ΔT = Temperature Change

Chemistry in Activity Chem Saver Page 41 constants: constants: –Specific heat of ice = 2.09 J/g·ºC –Specific heat of water = 4.18 J/g·ºC –Specific heat of steam = 2.03 J/g·ºC –Heat if fusion of water = 334 J/g

Practice Problem Q = m c Δ T 1. How much heat must your body transfer to 500.0g of water to heat it from 25.0 º C to body temperature, 37.0 º C?

Practice Problem Q = m c Δ T and Q = m × H fusion How much energy is needed to heat a 35.5g sample of ice at -17.5ºC to liquid water at 77.3ºC? How much energy is needed to heat a 35.5g sample of ice at -17.5ºC to liquid water at 77.3ºC?

Independent Work Complete Handout Complete Handout

Warm up 1. How much heat is needed to warm a 50.0g piece of solid copper from 25.0ºC to 200.0ºC? (the specific heat of copper is J/g·ºC)

Investigation Parts C and D Parts C and D

Chemistry in this Activity Chem Saver Page 15 Kinetic Theory Kinetic Theory –All particles in matter are in constant random motion solid liquid gas Adding Thermal Energy Removing Thermal Energy meltingboiling condensation freezing sublimation deposition Solid- least KE liquidGas- most KE definite indefiniteDefinite v, indefinite shape

WDYTN? WDYTN? – –At the beginning of this activity you were asked to: Draw three circles. In the first circle, draw what you think particles of material look like in the solid state. In the next circle, draw the particles of the same material as a liquid. In the final circle, illustrate the same material as a gas. –Now draw five circles. In the first circle, draw many particles as a gas. In the second circle, draw condensation of these particles. In the third circle, draw liquid particles. In the fourth circle, draw solidification of these particles from liquid into solid. Finally, in the fifth circle, draw the particles in the solid state.

Independent work Chem to Go Chem to Go – Problems 1-9 – Quiz tomorrow