A gas is suddenly expanded such that its final volume becomes 3 times its initial volume. If the specific heat at constant volume of the gas is 2R, then the ratio of initial to final pressures is nearly equal to
1
5
2
6.5
3
7
4
3.5
Official Solution
Correct Option:
(1)
Step 1: Concept
Sudden expansion implies an adiabatic process where . Step 2: Adiabatic Index
Given , then . . Step 3: Calculation
. Final Answer: (A)
02
PYQ 2010
medium
physicsID: met-2010
An ideal gas expands along the path AB as shown in the p-V diagram. The work done is
1
J
2
J
3
J
4
None of these
Official Solution
Correct Option:
(2)
Step 1: Concept
Work done is equal to the area under the p-V curve. Step 2: Analysis
The area is a trapezium: . Step 3: Calculation
. Final Answer: (B)
About Thermodynamics - MET
Thermodynamics is a vital chapter for MET aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Thermodynamics PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Thermodynamics carry the most weight. Then, tackle the questions iteratively to solidify your understanding.
