One kcal = _.
Correct answer: B. 4180 J
- A. 4.18 J
- B. 4180 J
- C. 2.09 J
- D. 2090 J
Explanation
A calorie is defined as the amount of energy required to raise the temperature of one gram of water by one degree Celsius. One kilocalorie (kcal) is equal to 1000 calories.1 kcal = 1000 calNow, 1 calorie is equal to 4.18 joules (J).Therefore, 1 kcal = 1000 cal x 4.18 J/cal = 4180 J
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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