badge image

Enroll For Free Now & Improve Your Performance.

×
User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 12th pass

                        

Why must heat energy be supplied to melt ice? After all,the temperature does not change.

5 months ago

Answers : (2)

Saurabh Koranglekar
askIITians Faculty
10233 Points
5 months ago
Vikas TU
13783 Points
							

Because it takes energy to make the phase transition from solid to liquid. Where else would it come from rather than heat energy?

There are, after all, two different energy transfer processes in thermodynamic systems: heat and work. Work, by the first law, is always reducible to raising and lowering of weights -- which obviously does not change the phase of the substance. So heat it must be.

Heat does NOT always raise the temperature of the substance. That is so only for substances with a definite heat capacity -- as is normal for substances when well away from the temperatures/pressures at which phase changes take place.

Why does it take energy to make the phase transition? Because to overcome the attraction between water molecules that would make them solid, you need to give them the kinetic energy to keep them moving away.

5 months ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 101 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details