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
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
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.
Practise Thermodynamics
714 free Thermodynamics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Thermal Equilibrium and Heat questions
The normal temperature of a human body on the centigrade scale is:
The bimetallic thermostat is an example of:
Which of the following condition must be true for transfer of energy from an object at temperature T1 to another object at temperature T2 ?
A heater is used for 5 minutes to heat 500g of water from 20˚C to 50˚C. What is the power of the heater? (The specific heat capacity of water is 4.2 J/gC).
The flow of heat energy from the hot to the cold body is a/an _ process.
A 100 W heater is used to melt 50g of ice at 0oC. How long should the heater be switched on? (The specific latent heat of fusion of ice is 334 J/g).