What to do

1. Read each the questions below.
2. Try to answer the question and write down your choice.
3. Now write a short sentence about why, you made that choice.
4. Click on each of the answers.
5. See if your choice and reason agrees with mine.

The Questions

• (a) The amount of energy required to heat 1 gram of water through 10 degrees centigrade.
• (b) The amount of energy required to heat 1 gram of water from 24.5 to 25.5 degrees centigrade.
• (c) The amount of energy required to heat 1 gram of water from 14.5 to 15.5 degrees centigrade (i.e. through 1 degree centigrade).

2) The Second Law of Thermodynamics states...

• (a) The amount of organized, usable energy in the universe is steadily increasing while the level of disorder is steadily decreasing.
• (b) The amount of organized usable energy in the universe is steadily decreasing, while the level of disorganization is steadily rising.
• (c) The total amount of energy in the universe is decreasing, while the level of disorder is rising.

3) A catalyst is a substance that...

• (a) increases the rate of a chemical reaction and is destroyed in the process.
• (b) decreases the rate of collisions between reactive molecules and increases the activation energy.
• (c) increases the rate of a chemical reaction and is not altered itself at the end of the reaction.