Unit 2Matter and Energy Review Worksheet Name:______

Unit 2Matter and Energy Review Worksheet Name:______

Classify the following as elements (E) or compounds (C):

1. hydrogen peroxide C
2. hydrogen E
3. copperE
4. waterC

Classify the following as pure substances (P) or mixtures (M):

1. salt water M
2. salad dressingM
3. air M
4. baking sodaP

Classify the following as homogeneous (HO) or heterogeneous (HE) mixtures:

1. graniteHE
2. Jell-OHO
3. CheeriosHE
4. Hand sanitizer solutionHO

Classify the following as intensive (I) or extensive (E), and physical (P) or chemical (C) properties:

1. densityIP
2. toxicity EC
3. boiling point IP
4. radioactivityIC

Classify the following as physical (P) or chemical (C) changes:

1. frying an eggC
2. icicle meltingP
3. campfire C
4. filtering a mixtureP

1. Complete the following table of elements and elemental symbols.

1. What are standard temperature and pressure, STP?0°C (or 273 K)1 atm

1. State the 5 principles of the kinetic molecular theory of gases

1)Straight line constant speed random motion

2)Mostly empty space

3)No attractions or repulsions

4)Collisions are elastic (don’t lose energy)

5)Temperature (in K) is a measure of the kinetic energy of atomic motion. (0 K = no motion)

1. Complete the following table about describing the states of matter.

1. Label the Solid, Liquid, Gas and Supercritical Fluid regions on the phase diagram.

1. What are the temperature and pressure of the critical point?

T = 647 KP = 218 atm

1. What are the temperature and pressure of the triple point? T = 273.2 K P = 0.006 atm

1. What is the normal melting point? ___273 K______

1. What is the normal boiling point? ____373 K______

1. How many grams of KCl can be dissolve in 100 g of water at 30°C?

About 37 g

1. To what temperature would you need to heat 100 g of water to dissolve 30.0 grams ofKNO3?

About 18°C

1. How many more grams of NaNO3 can you dissolve in 100 g of water at 60°C than at 20°C?

About 125 g – 86 g = 39 g

1. How many grams of hydrogen chloride gas, HCl can be dissolved in 100 g of water at 30°C?

About 67 g

1. You make a solution of NaNO3 by dissolving 25.00 g in 300.00 g of water at 50°C. How many more grams of NaNO3 would you need to add to create a saturated solution?

345 g – 25 g = 320 g

1. How many grams of KI can you dissolve in 30.0 g of water at 10°C?

1 atm = 760.0 mm Hg = 760.0 torr = 29.92 in. Hg = 14.69 psi = 101.3 kPa

1. Express a weather report in Europe as 97.8 kPain atmospheres.

= 0.965 atm

1. Express a weather report in Missouri as 30.05 inches Mercury in torr.

= 763.3 torr

1. Express 128°C in Kelvin.

401 K

1. Express 175 K in degrees Celsius.

– 98°C

1. What is the identity of a metal if a 25.0 g sample releases 250.0 J of heat when it cools from 68°C to 25°C?