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Chemistry Test 102
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Chemistry Test 102
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  • Question 1/10
    4 / -1

    Out of the following which one is not a state function?

  • Question 2/10
    4 / -1

    The difference between heat of reaction at constant pressure (ΔH) and at constant volume (ΔE) for the reaction :

    C(s) + 1/2 O2(g) → CO(g) is :-

    (Assume R = 0.002 Kcal K–1 mol–1 and temperature = T K)

     

  • Question 3/10
    4 / -1

    For complete combustion of ethanol,

    C2H5OH(ℓ) + 3O2(g) → 2CO2(g) + 3H2O(ℓ),

    the amount of heat produced as measured in bomb calorimeter, is 1364.47 kJ mol–1 at 25°C. Assuming ideality the Enthalpy of combustion, ΔcH, for the reaction will be :-

  • Question 4/10
    4 / -1

    A system absorbs 600 J of heat and does 250 J of work. The change in internal energy would be :

  • Question 5/10
    4 / -1

    The enthalpy change for transition of liquid water to steam is 3.73 KJ mol–1 at 373 K. Find ΔS in J/mol K :-

  • Question 6/10
    4 / -1

    If value of ΔG° = 0, then :

  • Question 7/10
    4 / -1

    For a certain reaction the change in enthalpy and change in entropy are 40.63 kJ mol–1 and 100 JK–1. What is the value of ΔG at 27°C and indicate whether the reaction is possible or not ?

  • Question 8/10
    4 / -1

    Consider the following reaction :

    Sign of ΔH, ΔS & ΔG for the reaction would be?

    Solutions

    Exothermic reaction —→ ΔH = –ve
    Δng = + ⇒ ΔS = +ve
    ΔH = – ve & ΔS = + ve ⇒ ΔG = –ve at any temperature 

     

  • Question 9/10
    4 / -1

    Standard enthalpies of formation of O3, CO2, NH3 and HI are 142.2, – 393.2, – 46.2 and + 25.9 kJ mol–1 respectively. The order of their increasing stabilities will be :-

  • Question 10/10
    4 / -1

    The heat of neutralization of HCl by NaOH is –55.9 KJ/ mol. If the heat of neutralization of HCN by NaOH is – 12.1 KJ/mol. The heat of dissociation of HCN is

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