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Principles of Thermodynamics and Spectroscopy Quiz

#1

Which law of thermodynamics states that energy cannot be created or destroyed, only transformed or transferred?

First Law
Explanation

Conservation of energy principle

#2

What is the unit of entropy in the International System of Units (SI)?

Joule per Kelvin (J/K)
Explanation

Measure of disorder in a system

#3

Which law of thermodynamics deals with the concept of absolute zero and thermal equilibrium?

Zeroth Law
Explanation

Temperature equivalence principle

#4

What is the term used to describe the study of the interaction between matter and electromagnetic radiation?

Spectroscopy
Explanation

Matter-energy interaction analysis

#5

In UV-Vis spectroscopy, what does the 'Vis' in the abbreviation stand for?

Visible
Explanation

Visible light region

#6

Which thermodynamic property represents the disorder or randomness of a system?

Entropy
Explanation

System randomness measure

#7

Which spectroscopic technique is commonly used for identifying the presence of functional groups in organic molecules?

Infrared (IR) Spectroscopy
Explanation

Based on molecular vibrations

#8

Which term describes the phenomenon where molecules absorb energy in the form of electromagnetic radiation and transition to higher energy levels?

Excitation
Explanation

Energy absorption process

#9

What does the term 'enthalpy' represent in thermodynamics?

Heat capacity at constant pressure
Explanation

Heat content of a system

#10

Which type of spectroscopy is based on the interaction of electromagnetic radiation with magnetic fields?

Nuclear Magnetic Resonance (NMR) Spectroscopy
Explanation

Nuclei spin alignment

#11

In which region of the electromagnetic spectrum does microwave spectroscopy typically operate?

Microwave region
Explanation

Low-frequency radiation

#12

Which spectroscopic technique is primarily used for determining the structure of organic compounds?

Nuclear Magnetic Resonance (NMR) Spectroscopy
Explanation

Organic compound structure analysis

#13

Which principle of thermodynamics states that the entropy of a perfect crystal at absolute zero is exactly equal to zero?

Third Law
Explanation

Entropy at absolute zero

#14

Which term describes the maximum amount of work that can be obtained from a system undergoing a reversible process?

Free energy
Explanation

Available energy for work

#15

According to the third law of thermodynamics, what happens to the entropy of a system as it approaches absolute zero?

It decreases and becomes zero
Explanation

Entropy reaches minimum

#16

What does a negative Gibbs free energy value indicate for a reaction at constant temperature and pressure?

The reaction is spontaneous
Explanation

Spontaneous reaction indicator

#17

What is the primary advantage of using Fourier-transform infrared (FTIR) spectroscopy over conventional dispersive infrared spectroscopy?

Faster acquisition times
Explanation

Speedier data collection

#18

According to Beer's Law, what is the relationship between the absorbance (A) of a substance and its concentration (c) and molar absorptivity (ε)?

A = εc
Explanation

Absorbance-concentration relationship

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