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

Total Price: Rs.

There are no items in this cart.
Continue Shopping
Grade: 11
Which of the following processes must violate the first law of thermodynamic? (There may be more then one ansewer!)
(A) W > 0, Qint  = 0                                                                                                                                 (B) W > 0, Q int > 0                                                                                                                                         (C) W > 0, Q int ), and ∆Eint
(E) W > 0, Q > 0, and ∆Eint
4 years ago

Answers : (1)

Aditi Chauhan
askIITians Faculty
396 Points
							The correct option is (E).
In accordance to first law of thermodynamics, for a thermodynamic system, in which internal energy is the only type of energy the system may have, the law of conservation of energy may be expressed as
Q + W = ΔEint
Here Q is the energy transferred (as heat) between the system and environment, W is the work done on (or by) the system and ΔEint is the change in the internal energy of the system.
By convention we have chosen Q to be positive when heat is transferred into the system and W to be positive when work is done on the system.
In the option (E), W > 0 and Q > 0. If we put this condition in the left hand side of the equation Q + W = ΔEint, then the right hand side of the equation must be greater than zero (ΔEint > 0). Thus W > 0, Q > 0, and ΔEint < 0 must violate the first law of thermodynamics. Therefore option (E) is correct.
4 years 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
To Win!!! Click Here for details