What is the difference in the amount of heat given out by 4kg of steam...
PHYSICS
JAMB 1991
What is the difference in the amount of heat given out by 4kg of steam and 4kg of water when both are cooled from 100oC to 80oC? [the specific latent heat of steam is 2,260,000Jkg-1, specific heat capacity of water is 4200Jkg-1K-1]
- A. 4200J
- B. 2,260,OOOJ
- C. 9,040,000J
- D. 9,380,000J
Correct Answer: C. 9,040,000J
Explanation
Heat by water = mc\(\theta\)
Heat by steam = mc\(\theta\) + mL
Difference = mL = 4 x 2,260,000
= 9,040,000J
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *