Which of the following must be negative for a process to be spontaneous as written?
Interpretation:
The role of Gibbs free energy in a spontaneous reaction is to be explained.
Concept introduction:
Gibbs free energy is defined as the energy that is used to get the work done. The abbreviation for Gibbs free energy is
The standard Gibbs free energy, abbreviated as
Answer to Problem 1KSP
Correct answer: Option(b)
Explanation of Solution
Reason for correct option:
The Gibbs energy is given by the expression as follows:
Here,
At constant temperature and pressure condition in a reaction,
This is so, because for a spontaneous process, free energy of the system decreases and they do not need any external energy to carry out the process.
Hence, option (b) is the correct answer.
Reasons for incorrect options:
Option (a) is incorrect because the sign
Option (c) is incorrect because the equilibrium constant
Option (d) is incorrect because the reaction quotient
Option (e) is incorrect as
Hence, options(a), (c), (d), and (e) are incorrect.
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