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Unit 1 Heat

Terminology and calorie examples

QuestionAnswer
Chemical calorie cal
kilo calorie k-cal, 1000 chemical calorie
Dietary calorie Cal, 1000 chemical calorie
Celsius to Kelvin K = C +273
Kelvin to Celsius C = k - 273
What is the chemical calorie of heat? 1 cal / 1g x 1C
Chemical calorie formula? mass of H2O(g) x AT(C) x 1cal / 1g x 1C
How many calories would it take to raise the temperature of 520 grams of water from 15 °C to 95 °C ? 1) 95 -15 = 80 C 2) 520g x 80 C x 1cal / 1g x 1C = 41,600
If you burn one teaspoon of sugar in a bomb calorimeter, the temperature of 2 L of water is raised from 22 °C to 27 °C, how many cals, k-cals, and Cals does the sugar contain? 1) 2L = 2,000 g 2) 27 -22 = 5 C 3) 2,000g x 5C x 1cal / 1g x 1C = 10,000 4)10000 cals x 1 k-cal / 1000 cals = 10 k-cals and Cals
Created by: edith1234
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