menu search
brightness_auto
Feel free to answer or ask any questions.
If you are new here please see how to use or FAQ.
more_vert

The internal energy change (in J) when 90 g of water undergoes complete evaporation at 100°C is ...............

(Given : ΔHvap for water at 373 K = 41 kJ/mol, R = 8.314 JK–1 mol–1)

Numerical Value Type

more_vert
Thermodynamics, Enthalpy Change of a Reaction

1 Answer

more_vert
 
verified
Best answer

Ans. (189494)

Sol. ΔH = ΔU + ΔngRT

41000 × 5 = ΔU + 5 × 8.314 × 373

205000 = ΔU + 15505.61

ΔU = 189494.39 J = 189494 J

thumb_up_off_alt 0 like thumb_down_off_alt 0 dislike

Welcome to Jee Neet QnA, where you can ask questions and receive answers from other members of the community.


Join our Telegram group for live discussion.

Telegram Group

Subscribe our YouTube channel for video solutions with explanation.

YouTube Channel

Download Jee Neet QnA Books in PDF for offline learning.

Jee Neet QnA Books

1.2k questions

842 answers

383 comments

89 users

...