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Entropy change of the surroundings from delta H and temperature

The same question, asked 3 times: 14 May 2024 S1*, 19 Apr 2025 S2*, 16 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    14 May 2024 S1

    53
    If enthalpy change for following reaction at 300 K is +7 kJ mol−1+7\,\text{kJ mol}^{-1}, find the entropy change of surrounding? H2O(s)⟶H2O(l)\text{H}_2\text{O}_{(s)}\longrightarrow\text{H}_2\text{O}_{(l)}

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  2. Question 2

    19 Apr 2025 S2

    65
    Calculate the entropy change of surrounding if 2 moles of H2H_{2} and 1 mole of O2O_{2} gas combine to form 2 moles of liquid water by releasing 525 kJ heat to surrounding at constant pressure and at 300 K .

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  3. Question 3

    16 Apr 2026 S1

    7
    What is the change in entropy of surrounding for the reaction, H2(g)+1/2 O2(g)→H2O(l)\mathrm{H_{2(g)} + 1/2\,O_{2(g)} \rightarrow H_2O_{(l)}} at 298 K if standard enthalpy of formation of water is −286-286 kJ ?

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