REVIEW QUESTIONS

Chapter 3

1. Convert the following temperatures:
   a) to
   b) 200 K to
   c) to
2. Classify the following properties of sodium metal as physical or chemical:
   a) silver metallic color
   b) turns grey in air
   c) melts at
   d) reacts explosively with chlorine
   e) dissolves in water to produce a gas
   f) malleable (can be shaped)
3. Classify the following changes as physical or chemical :
   a) steam condenses to a liquid on a cool surface
   b) baking soda dissolves in vinegar, producing bubbles
   c) moth balls gradually disappear at room temperature
   d) when a can of soda is opened bubbles form
4. How many calories of heat are required to heat 45 g of water from to ? (Specific heat of water )
5. A sample of gold weighing 15 g requires 84 calories of heat to increase its temperature from to . Calculate the specific heat of gold.
6. If 372 J of heat are added to 5.00 g of water originally at , what would be the final temperature of the water? (specific heat of water )
7. How many kWh of energy are needed to heat 60.0 gal of water from to ? of water ; specific heat of water
8. When ice melts, it absorbs 0.33 kJ of heat per gram. How many grams of ice are required to cool a 12-oz drink from to , if the specific heat capacity of the drink is ? ( )
9. Three blocks of metal (silver, copper and aluminum) with equal masses are heated in an oven for the same time.
   a) Which metal will attain the highest temperature? Explain.