Fahrenheit • Celsius • Kelvin, Exercises of Chemistry

Download Fahrenheit • Celsius • Kelvin and more Exercises Chemistry in PDF only on Docsity! Temperature Scales Section 5.7 Mrs. Baldessari Chemistry • Fahrenheit • Celsius • Kelvin Anders Celsius 1701-1744 Lord Kelvin (William Thomson) 1824-1907 Gabriel Fahrenheit 1686-1736 3 Temperature Scales Notice that 1 kelvin = 1 degree Celsius Boiling point of water Freezing point of water Celsius 100 ˚C 0 ˚C 100˚C vin 373 K 273 K 100 K Fahrenheit 32 ˚F 212 ˚F 180˚F Fahrenheit Formula F = 9/5 °C + 32 ° Celsius Formula (°F - 32) * 5/9 = °C Temperature Conversions A person with hypothermia has a body temperature of 29.1°C. What is the body temperature in °F? °F = 9/5 (29.1°C) + 32 = 52.4 + 32 = 84.4°F Learning Check The normal temperature of a chickadee is 105.8°F. What is that temperature in °C? 1) 73.8 °C 2) 58.8 °C 3) 41.0 °C Answer: 41 °C Exercise At what temperature does C = F? • Since °C equals °F, they both should be the same value (designated as variable x). • Use one of the conversion equations such as: • Substitute in the value of x for both T°C and T°F. Solve for x. Solution  F C 32 1.80   T T Solution  F C 32 1.80   T T   32 1.80   x x So –40°C = –40°F 40 x