(a)
Interpretation:
The value for
Concept introduction:
The change of Gibbs free energy to form one mole of a substance from its constituent elements when all the substances in the standard form is known as standard Gibbs free energy of formation
The standard Gibbs free energy of reaction
If the value of standard Gibbs free energy of reaction
(a)
Answer to Problem 77GQ
The value for
Explanation of Solution
Any metal M reacts with hydrogen chloride to give metal halide and hydrogen. The chemical equation of any metal M with hydrogen chloride is written as,
The standard Gibbs free energy of reaction
The standard Gibbs free energy of formation
Substitute the value of standard Gibbs free energy of formation
Therefore, the value for
(b)
Interpretation:
Among the metals,
Concept introduction:
The change of Gibbs free energy to form one mole of a substance from its constituent elements when all the substances in the standard form is known as standard Gibbs free energy of formation
The standard Gibbs free energy of reaction
If the value of standard Gibbs free energy of reaction
(b)
Answer to Problem 77GQ
The metals
Explanation of Solution
The standard Gibbs free energy of reaction
Given:
Refer to the appendix L for the value of standard Gibbs free energy of formation
The chemical reaction of barium with hydrogen chloride is written as,
The value of standard Gibbs free energy of formation
The value of standard Gibbs free energy of formation
Substitute these values in equation (2) to calculate the value of standard Gibbs free energy of reaction
Therefore, the value of standard Gibbs free energy of reaction
Hence, the negative value of standard Gibbs free energy of reaction indicates that the barium metal gives a product-favoured reaction with
The chemical reaction of lead with hydrogen chloride is written as,
The value of standard Gibbs free energy of formation
The value of standard Gibbs free energy of formation
Substitute these values in equation (2) to calculate the value of standard Gibbs free energy of reaction
Therefore, the value of standard Gibbs free energy of reaction
Hence, the negative value of standard Gibbs free energy of reaction indicates that the lead metal gives a product-favoured reaction with
The chemical reaction of mercury with hydrogen chloride is written as,
The value of standard Gibbs free energy of formation
The value of standard Gibbs free energy of formation
Substitute these values in equation (2) to calculate the value of standard Gibbs free energy of reaction
Therefore, the value of standard Gibbs free energy of reaction
Hence, the positive value of standard Gibbs free energy of reaction indicates that the mercury metal does not form a product-favored reaction with
The chemical reaction of titanium with hydrogen chloride is written as,
The value of standard Gibbs free energy of formation
The value of standard Gibbs free energy of formation
Substitute these values in equation (2) to calculate the value of standard Gibbs free energy of reaction
Therefore, the value of standard Gibbs free energy of reaction
Hence, the negative value of standard Gibbs free energy of reaction indicates that the titanium metal gives a product-favoured reaction with
Therefore, the metals
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Chapter 21 Solutions
CHEMISTY+CHEMICAL REACTIVITY
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