Tamil Nadu Board of Secondary EducationHSC Science Class 11th

# List the characteristics of internal energy. - Chemistry

List the characteristics of internal energy.

#### Solution

• The internal energy of a system is an extensive property. It depends on the number of substances present in the system.
• The internal energy of a system is a state function. It depends only upon the state variables (T, P, V. n) of the system.
• The change in internal energy is as ∆U = U2 – U1
• In a cyclic process, there is no energy change. ∆"U"_"(cyclic)" = 0.
• If the internal energy of the system at the final state (Uf) is less than the internal energy of the system at its initial state (Ui), then ∆U would be negative.
• if Uf < Ui ∆U = Uf – Ui = −ve
• if Uf > Ui ∆U = Uf – Ui = +ve
Concept: System and Surrounding
Is there an error in this question or solution?

#### APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 11th Chemistry Volume 1 and 2 Answers Guide
Chapter 7 Thermodynamics
Evaluation | Q II. 22. | Page 225
Share