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May 15, 2024Thermodynamics: In simple words, Thermodynamics is a branch of Physics that deals with the transfer of energy from one place to another and from one form to another. Thermodynamics can also be viewed as the relationship that exists between heat, temperature, work and energy. In formal terms, it is the science of the relationship between heat and other forms of energy.
Thermal energy is the energy generated from heat. So when we talk of Thermodynamics, we essentially talk of how thermal energy is converted from one form of energy to another. Furthermore, we also talk of how matter is affected by the conversion process. Let us look at some of tricky questions for thermodynamics.
Here are a few tricky questions from thermodynamics that students can solve:
Q.1. We obtain Isothermal Curves by drawing:
Q.2. Out of the following parameters, which does not characterise the thermodynamic state of matter?
Q.3. Why can’t even a Carnot heat engine give 100% efficiency? That’s because, we cannot:
Q.4. Let’s heat 100 g of water from 30 °C to 50 °C. If we Ignore the slight expansion of the water, the change in its internal energy is:
(a) 4.2 kJ
(b) 8.4 kJ
(c) 84 kJ
(d) 2.1 kJ
Q.5. 0.048 eV is the average translational kinetic energy of 02 (molar mass 32) molecules at a particular temperature. What would be the translational kinetic energy of N2 (molar mass 28) molecules in eV at the same temperature?
(a) 0.0015
(b) 0.003
(c) 0.048
(d) 0.768
These are a few tricky questions that would make students rack their brains. By answering such questions, students would be in a better position as they face their exams.
As and when students study Thermodynamics in their preparation for JEE exams, it is imperative that they recap the Laws of Thermodynamics. Here are the four Laws of Thermodynamics:
Zeroth law: If two systems are in thermal equilibrium with a third system, then all the three systems are in thermal equilibrium with one another.
First law: Energy can neither be created nor destroyed, but only be transformed from one form to another.
Second law: For any isolated system, the entropy always increases.
Third law: The entropy of a system approaches a constant value as the temperature approaches absolute zero.
Here are a few important terms which a student should keep in mind as they study Thermodynamics:
Here’s a recap of the different types of process when a student studies Thermodynamics:
Thermodynamics is an important chapter in JEE Mains. It carries a substantial weightage in terms of questions asked in the examinations. As many as three questions are asked from the chapter Heat and Thermodynamics in the JEE Mains, which carry combined marks of 12. So if a student is not adept in this chapter, the loss will be heavy.
We provide a few tips so that the student can score high in the exams:
The student can access the JEE Main Mock Test from Embibe. We hope this article on Thermodynamics helps the student in their preparation for JEE. To get access to a world of study materials which enable a student to prepare themselves assiduously for many competitive exams, keep do visiting Embibe.