Temperature Conversions Temperature l Particles are always moving

Temperature l Particles are always moving. l When you heat water, the water molecules

Temperature • is a measure of how hot or cold an object is compared

Temperature Scales • Are • have reference points for the boiling and freezing points

Learning Check A. What is the temperature of freezing water? 1) 0°F 2) 0°C

Fahrenheit Formula • On the • , there are 180°F between the freezing and

Celsius Formula • TC is obtained by rearranging the equation for TF. TF =

Solving A Temperature Problem A person with hypothermia has a body temperature of 34.

Learning Check The normal temperature of a chickadee is 105. 8°F. What is that

Learning Check A pepperoni pizza is baked at 455°F. What temperature is needed on

Learning Check On a cold winter day, the temperature is – 15°C. What is

Kelvin Temperature Scale The • has 100 units between the freezing and boiling points

Learning Check What is normal body temperature of 37°C in Kelvins? 1) 236 K

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Temperature Conversions

Temperature l Particles are always moving. l When you heat water, the water molecules move faster. l When molecules move faster, the substance gets hotter. l When a substance gets hotter, its temperature goes up.

Temperature • is a measure of how hot or cold an object is compared to another object. • indicates that heat flows from the object with a higher temperature to the object with a lower temperature. • is measured using a thermometer that contains a liquid that expands with heat and contracts with cooling. .

Temperature Scales • Are • have reference points for the boiling and freezing points of water.

Learning Check A. What is the temperature of freezing water? 1) 0°F 2) 0°C 3) 0 K B. What is the temperature of boiling water? 1) 100°F 2) 32°F 3) 373 K C. How many Celsius units are between the boiling and freezing points of water? 1) 100 2) 180 3) 273

Fahrenheit Formula • On the • , there are 180°F between the freezing and boiling points and on the , there are 100°C. 180°F = 9°F = 1. 8°F 100°C 5°C 1°C In the formula for the , adding 32 adjusts the zero point of water from 0°C to 32°F. TF = 9/5 TC + 32 TF = 1. 8 TC + 32 or

Celsius Formula • TC is obtained by rearranging the equation for TF. TF = 1. 8 TC + 32 • Subtract 32 from both sides. TF - 32 = 1. 8 TC ( +32 - 32) TF - 32 = 1. 8 TC • Divide by 1. 8 = °F - 32 1. 8 TF - 32 1. 8 = TC = 1. 8 TC 1. 8

Solving A Temperature Problem A person with hypothermia has a body temperature of 34. 8°C. What is that temperature in °F? TF = 1. 8 TC + 32 TF = 1. 8 (34. 8°C) exact tenth's + 32° exact = 62. 6 + 32° = 94. 6°F tenth’s

Learning Check The normal temperature of a chickadee is 105. 8°F. What is that temperature on the Celsius scale? 1) 73. 8°C 2) 58. 8°C 3) 41. 0°C

Learning Check A pepperoni pizza is baked at 455°F. What temperature is needed on the Celsius scale? 1) 423°C 2) 235°C 3) 221°C

Learning Check On a cold winter day, the temperature is – 15°C. What is that temperature in °F? 1) 19°F 2) 59°F 3) 5°F

Kelvin Temperature Scale The • has 100 units between the freezing and boiling points of water. 100 K = or 1 K = • is obtained by adding 273 to the Celsius temperature. TK = • contains the lowest possible temperature, absolute zero (0 K). 0 K =

Temperatures

Learning Check What is normal body temperature of 37°C in Kelvins? 1) 236 K 2) 310. K 3) 342 K