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Test: Internal Energy - Chemistry MCQ


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10 Questions MCQ Test - Test: Internal Energy

Test: Internal Energy for Chemistry 2024 is part of Chemistry preparation. The Test: Internal Energy questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Internal Energy MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Internal Energy below.
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Test: Internal Energy - Question 1

The internal energy is the heat evolved or absorbed at

Detailed Solution for Test: Internal Energy - Question 1

The heat that is emitted or absorbed at a constant volume is the internal energy.

Test: Internal Energy - Question 2

The internal energy always has a

Detailed Solution for Test: Internal Energy - Question 2

The internal energy of a definite amount of a particular substance under given conditions of temperature and pressure always has a definite value.

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Test: Internal Energy - Question 3

Which law explained how internal energy, heat, and work relate to one another?

Detailed Solution for Test: Internal Energy - Question 3

According to the first law of thermodynamics, ΔE = q + w
Where q is either heat absorbed or given out by the system.
W is the work done on or by the system.

Test: Internal Energy - Question 4

Internal energy is

Test: Internal Energy - Question 5

Internal energy(ΔE) is equal to the heat supplied(q) in

Detailed Solution for Test: Internal Energy - Question 5

For Isochoric change, ΔV = 0 w = PΔV = 0 S
ince, ΔE = q + w
This implies, ΔE = q

Test: Internal Energy - Question 6

For which of the following reactions ΔH = ΔU?

Detailed Solution for Test: Internal Energy - Question 6

As we know that, ΔH = ΔU + ΔngRT
Where Δng denotes the stoichiometric difference between the gaseous products and the gaseous reactants.

Hence for reaction c) ΔH = ΔU as Δng = 0.

Test: Internal Energy - Question 7

In an isochoric process, the increase in internal energy is

Detailed Solution for Test: Internal Energy - Question 7

For isochoric processes, ΔV = 0, so qV = ΔE i.e, heat given to a system under constant volume is used up in increasing ΔE.

Test: Internal Energy - Question 8

For isothermal expansion, which is true?

Detailed Solution for Test: Internal Energy - Question 8

When the temperature remains constant, isothermal expansion occurs. This suggests that ΔT = 0. Additionally, since internal energy depends on temperature, isothermal expansion results in zero internal energy.

Test: Internal Energy - Question 9

Which energy is not the part of the internal energy?

Detailed Solution for Test: Internal Energy - Question 9

Internal energy is the sum of all different types of energies associated with atoms and molecules such as electronic energy, nuclear energy, chemical bond energy, potential energy and kinetic energy. Gravitational energy is not the part of Internal energy.

Test: Internal Energy - Question 10

ΔU is zero in

Detailed Solution for Test: Internal Energy - Question 10

Since, the ΔU is a function of temperature and volume,

In isothermal process, Temperature is constant so ΔU=0

and in isochoric process, volume is constant so ΔU=0

and in cyclic process, after one complete cycle the system returns to its original state, so ΔU=0

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