Unit 1: Energy

Answer 1

Total of potential and kinetic

Relates to common measure – heat/temperature

Always moves from more to less energy

Question 2

Heat

Answer 2

a form of energy that flows between two samples of matter because of their difference in temperature

Question 3

Temperature

Answer 3

a measure of the intensity of heat, that is, the hotness or coldness of a sample or object

Answer 4

• Energy/temperature relationship depends on substance
  
  • Temp of H2O rises slower than iron
• Measureable quantity – quantitative
• Typically thermometer
• Heat is extensive – temperature is intensive
• Temperature scales:
  
  • Fahrenheit
  • Celsius
  • Kelvin

Question 5

Temperature Scales

3 types?

H₂0 freezing & boiling temp?

Room temp?

Body temp?

Answer 5

Fahrenheit – US standard system

Celsius – metric temperature

Kelvin – absolute temperature

Based on measurement of references:

• H₂O Freezing
  
  • 32°F, 0°C, 273.15 K
• H₂O Boiling
  
  • 212°F, 100°C, 373.15 K
• Room Temperature
  
  • 72°F, 22°C, 295.15 K
• Body Temperature
  
  • 98.6°F, 37°C, 310.15 K

Question 6

Temperature Conversion

Fahrenheit to Celsius:​

Celsius to Fahrenheit:

Answer 6

F → C

[°C] = ([°F] − 32) ÷ 1.8

C → F

[°F] = ([°C] × 1.8) + 32

Question 7

Temperature Conversion

Celsius to Kelvin :​

Kelvin to Celsius:

Answer 7

Celsius to Kelvin :

[K] = [°C] + 273.15

Kelvin to Celsius:

[°C] = [K] − 273.15

Question 8

Convert 245 K to F and C:

K to C =

C to F =

Question 9

Convert the following to the unused temperature scales:

96.3˚F

102˚C