Week 4 - thermodynamics

Question 1

Energyconversion

Photosynthesis
Nervous system
muscles

Answer 1

Energy

Light - chemical
chemical - electrical
chemical - mechanical

Answer 1

Organisms require energy.
organisms are energy-transformers (takes in and transduces to new forms)
all chemical reactions require energy

Is the study of energy!

Question 2

Why cells need energy

Answer 2

Answer 3

Question 4

OBS not a question for answering

Question 5

Define the term “energy”

Answer 5

Ability to do work

Question 6

What is kinetic and potential energy

Answer 6

Kinetic: energy in moving objects or mass (mechanical or electrical)

Potential energy: stored potential that can be put to future use ex nuclear or chemical energy

Question 7

Answer 7

Question 8

3 sorts of thermodynamic systems

Answer 8

Question 9

First law of thermodynamics

Answer 9

Energi is neither created nor destroyed → allows to be exchanged between a system and its surroundings.

Question 10

Second law of thermodynamics

Answer 10

Also called law of degradation of energy or law of entropy

Question 11

What can we know from 2nd law of thermodynamics

Answer 11

Question 12

Question 13

Question 14

Define enthalpy

Answer 14

Change in heat content or heat formation in a system

Question 15

1.40 i lecture

Question 16

What is entropy

Answer 16

measure of randomness or disorder in a system

Answer 17

Answer 18