Please wait...
Contact Us
Need assistance? Contact us on below numbers

For Study plan details

10:00 AM to 7:00 PM IST all days.

For Franchisee Enquiry



Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this number


Mon to Sat - 10 AM to 7 PM

1 kg of water at 373 K is converted into steam at same temperature. Volume of 1 cm3 of water become 1671 cm3 on boiling. What is the change in the internal energy of the system if the latent heat of vaporisation of water is 5.4×10^5 cal/kg?

Temp and pressure to constant .How to know whether isobaric or isothermal?

Asked by vijaygireesh 23rd March 2020, 12:38 PM
Answered by Expert
Conversion of water at 373 K to steam at same temperature is isothermal process.
we can not keep pressure also constant, because volume becomes 1671 times while temperature remains constant
Change in internal energy is the enrgy absorbed as latent heat of vapouraisation.
Change in internal energy ΔU for a 1 kg water at 373 K to become steam at same temperature is given by
ΔU = 5.4 × 105 / 4.2 = 1.286 × 105 J
Answered by Expert 23rd March 2020, 1:09 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer 1/10

Your answer has been posted successfully!

Chat with us on WhatsApp