Answer:
The answer is weathering.
Explanation:
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Fe(s)+Ca(NO₃)₂(aq)⇒no reaction
<h3>Further explanation</h3>
In voltaic series
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au
The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent
The more to the right, the metal is less reactive (harder to release electrons) and the stronger oxidizing agent
So that the element located on the left can push the element on the right in the redox reaction
Reaction
Fe(s)+Ca(NO₃)₂(aq)⇒no reaction
Fe cannot reduce Ca because Ca is more reactive, so the reaction does not occur
On the contrary, this reaction can occur
3Ca(s) + 2Fe(NO₃)₃(aq) = 3Ca(NO₃)₂(aq) + 2Fe(s)
<u>Answer:</u> The correct answer is
<u>Explanation:</u>
From the given options:
represents the change in Gibb's Free energy of the reaction. If this value is negative, the reaction is said to be spontaneous and if the value is positive, the reaction is said to be non-spontaneous.
represents the change in enthalpy of the reaction. If this comes out to be negative, then the reaction is said to be exothermic and if it comes out to be positive, then the reaction is said to be endothermic.
represents the change in entropy of the reaction. If this comes out to be positive, then it means there is increase in entropy and if this comes out to be negative, then it means there is decrease in entropy.
Hence, the correct answer is