For each reaction, calculate AHrn, ASn, and AGxn at 25 °C and state whether or not the reaction is spontaneous. If the reaction is not spontaneous, would a change in temperature make it spontaneous? If so, should the temperature be raised or lowered from 25 °C? a. N2O4(8) – 2 NO2(g) b. NH4C1(s) c. 3 H2(8) + Fe2O3(s) → 2 Fe(s) + 3 H2O(8) d. N2(8) + 3 H2(8) 0.25 HCl(8) + NH3(8) - | 2 NH3(8) HO

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**Problem 61:**  
For each reaction, calculate ΔH°_rxn, ΔS°_rxn, and ΔG°_rxn at 25 °C and state whether or not the reaction is spontaneous. If the reaction is not spontaneous, would a change in temperature make it spontaneous? If so, should the temperature be raised or lowered from 25 °C?  

a. \( \text{N}_2\text{O}_4(g) \rightarrow 2 \text{NO}_2(g) \)  
b. \( \text{NH}_4\text{Cl}(s) \rightarrow \text{HCl}(g) + \text{NH}_3(g) \)  
c. \( 3 \text{H}_2(g) + \text{Fe}_2\text{O}_3(s) \rightarrow 2 \text{Fe}(s) + 3 \text{H}_2\text{O}(g) \)  
d. \( \text{N}_2(g) + 3 \text{H}_2(g) \rightarrow 2 \text{NH}_3(g) \)  

**Instructions:**  
- Calculate the enthalpy change (ΔH°_rxn) for each reaction.
- Calculate the entropy change (ΔS°_rxn) for each reaction.
- Calculate the Gibbs free energy change (ΔG°_rxn) at 25 °C for each reaction.
- Determine if each reaction is spontaneous under standard conditions at 25 °C.
- For non-spontaneous reactions, assess if a temperature change could facilitate spontaneity and recommend whether the temperature should be raised or lowered.
Transcribed Image Text:**Problem 61:** For each reaction, calculate ΔH°_rxn, ΔS°_rxn, and ΔG°_rxn at 25 °C and state whether or not the reaction is spontaneous. If the reaction is not spontaneous, would a change in temperature make it spontaneous? If so, should the temperature be raised or lowered from 25 °C? a. \( \text{N}_2\text{O}_4(g) \rightarrow 2 \text{NO}_2(g) \) b. \( \text{NH}_4\text{Cl}(s) \rightarrow \text{HCl}(g) + \text{NH}_3(g) \) c. \( 3 \text{H}_2(g) + \text{Fe}_2\text{O}_3(s) \rightarrow 2 \text{Fe}(s) + 3 \text{H}_2\text{O}(g) \) d. \( \text{N}_2(g) + 3 \text{H}_2(g) \rightarrow 2 \text{NH}_3(g) \) **Instructions:** - Calculate the enthalpy change (ΔH°_rxn) for each reaction. - Calculate the entropy change (ΔS°_rxn) for each reaction. - Calculate the Gibbs free energy change (ΔG°_rxn) at 25 °C for each reaction. - Determine if each reaction is spontaneous under standard conditions at 25 °C. - For non-spontaneous reactions, assess if a temperature change could facilitate spontaneity and recommend whether the temperature should be raised or lowered.
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