Discussion
The latent heat of vaporisation of water at typical drying temperatures is about
Answer: D
Correct answer: 2.3 MJ per kg
The latent heat of vaporisation of water is about \( 2.26 \) MJ/kg at 100 degrees Celsius and a little higher at typical drying temperatures, so \( 2.3 \) MJ/kg is the working figure.
It is worth carrying in mind because it sets the theoretical floor on drying energy: removing a tonne of water needs at least \( 2.3 \) GJ however good the dryer, and real specific energy consumption of \( 3 \) to \( 5 \) MJ per kg of water reflects the losses on top of that. The value \( 4.2 \) is the specific heat of liquid water in kJ/kg per degree, a different quantity.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development