1.3 Energy and equilibria

Question 1

Define the first law of thermodynamics

Answer 1

Principle of conservation of energy, states that energy in an isolated system cannot be created or destroyed.
- also known as the principle of conversion of energy

Question 2

Define Thermodynamic

Answer 2

The study of energy

Question 3

Define Energy

Answer 3

Something that causes change that can be measured

Question 4

examples of energy

Answer 4

Sunlight - Light energy
Glucose - Chemical energy
Heat - Thermal energy

Question 5

Example of the first law of thermodynamics

Answer 5

Photosynthesis

Sunlight(light) turns to Glucose (chemical) through transformation

Question 6

Example of the second law of thermodynamics

Answer 6

Respiration

Glucose(chemical) turn to heat(thermal) throught transformation

Question 7

Entropy

Answer 7

the measure of the amount of disorder in a system

Question 8

How does the first law of thermodynamics apply to the food chain and the ecosystem?

Answer 8

Energy can only be changed from one form to another. Energy for the functioning of an ecosystem comes from the Sun. Solar energy is absorbed by plants where in it is converted to stored chemical energy. Some energy is lost to the surroundings as heat.

Question 9

Define the second law of thermodynamics

Answer 9

living systems loose energy over time
or
entropy of a system increases over time