Chemistry

Question 1

Water is the basic formula for combustion?

Answer 1

oxygen + hydrocarbon –> water + carbon dioxide

Question 2

What is the formula for partially incomplete combustion?

Answer 2

oxygen + hydrocarbon –> water + carbon monoxide

Question 3

What is the formula for partially combustion?

Answer 3

oxygen + hydrocarbon –> water + carbon

Question 4

Define Renewable Fuel. Provide an example

Answer 4

Doesn’t run out.

Example: solar energy

Question 5

Define non- renewable fuel. Provide an example.

Answer 5

Runs out

Example: fossil fuel; crude oil; coal; natural gas

Question 6

When their is a low activation energy, does the reaction proceed faster or slower?

Answer 6

Faster

Question 7

What is activation energy?

Answer 7

The minimum amount of energy the reactants must possess in order to form products.

Question 8

What is the difference between heat and temperature?

Answer 8

Heat is measured in joules/ kilojoules, whereas temperature is measured in degrees
Heat is hard to measure, whereas temperature is easy to measure.

Question 9

Do exothermic reactions release or absorb energy?

Answer 9

Release

Question 10

in an exothermic reaction, do particles go from small to large, or large to small?

Answer 10

Large –> small

Question 11

do exothermic reactions feel warm or cold?

Answer 11

cold

Question 12

Is the change in enthalpy positive or negative for an exothermic reaction?

Answer 12

Negative

Question 13

Give 2 examples of exothermic reactions

Answer 13

Cellular Respiration
Combustion of Fuels
Detonation of explosives