My Learning Cart
?
Categories
Account

In a closed system, if the internal energy increases, what can be said about the

₹0.0
Login to Download
  • 📥 Instant PDF Download
  • ♾ Lifetime Access
  • 🛡 Secure & Original Content

What’s inside this PDF?

Question: In a closed system, if the internal energy increases, what can be said about the work done and heat added? (2020)

Options:

  1. Work done is positive and heat added is negative
  2. Work done is negative and heat added is positive
  3. Both work done and heat added are positive
  4. Both work done and heat added are negative

Correct Answer: Both work done and heat added are positive

Exam Year: 2020

Solution: 

According to the first law of thermodynamics, if the internal energy increases, it implies that either work is done on the system or heat is added to the system.

In a closed system, if the internal energy increases, what can be said about the

Practice Questions

Q1
In a closed system, if the internal energy increases, what can be said about the work done and heat added? (2020)
  1. Work done is positive and heat added is negative
  2. Work done is negative and heat added is positive
  3. Both work done and heat added are positive
  4. Both work done and heat added are negative

Questions & Step-by-Step Solutions

In a closed system, if the internal energy increases, what can be said about the work done and heat added? (2020)
  • Step 1: Understand that a closed system means no matter can enter or leave the system, but energy can be exchanged.
  • Step 2: Know that internal energy is the total energy contained within the system.
  • Step 3: Recall the first law of thermodynamics, which states that the change in internal energy (ΔU) is equal to the heat added to the system (Q) minus the work done by the system (W).
  • Step 4: If the internal energy increases (ΔU > 0), it means that the sum of heat added to the system and work done on the system is greater than the work done by the system.
  • Step 5: Conclude that either heat is added to the system (Q > 0) or work is done on the system (W < 0), or both.
  • First Law of Thermodynamics – The principle that energy cannot be created or destroyed, only transformed, which relates changes in internal energy to heat added and work done.
Soulshift Feedback ×

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?

Not likely Very likely
Home Practice Performance eBooks