$A$ gas expands from $3 \ dm^{3}$ to $5 \ dm^{3}$ against a constant pressure of $3 \ atm$. The work done during this expansion is used to heat $10 \ mol$ of water at $290 \ K$. What will be the final temperature of the water in $K$? (Specific heat of water = $4.184 \ J \ g^{-1} \ K^{-1}$)

  • A
    $290.80$
  • B
    $260.85$
  • C
    $190.30$
  • D
    $310.90$

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$A$ sample of $n$-octane $(1.14 \ g)$ was completely burnt in excess of oxygen in a bomb calorimeter,whose heat capacity is $5 \ kJ \ K^{-1}$. As a result of the combustion reaction,the temperature of the calorimeter increased by $5 \ K$. The magnitude of the heat of combustion of octane at constant volume is $.......... \ kJ \ mol^{-1}$ (nearest integer).

One mole of water is converted into steam at $373 \, K$. The heat absorbed at $1 \, atm$ pressure is $40.68 \, kJ$. If the molar volumes of water and steam are $18 \, mL$ and $30600 \, mL$ respectively,find $\Delta U$ for the process in $kJ$.

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For an isothermal expansion of $2 \, \text{mol}$ of a gas at $298 \, K$ from $5 \, dm^3$ to $40 \, dm^3$ under constant external pressure,the work done $(W)$ and the reversible work $(W_{rev})$ are,respectively:

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Match the following columns:
Column $I$ Column $II$
$(a)$ Adiabatic process $(1)$ Heat
$(b)$ Isolated system $(2)$ Constant volume
$(c)$ Isothermal change $(3)$ First law of thermodynamics
$(d)$ Path function $(4)$ No exchange of matter and energy
$(e)$ State function $(5)$ No heat exchange
$(f)$ $\Delta U = q$ $(6)$ Constant temperature
$(g)$ Law of conservation of energy $(7)$ Internal energy
$(h)$ Reversible process $(8)$ $p_{ext} = 0$
$(i)$ Free expansion $(9)$ Constant pressure
$(j)$ $\Delta H = q$ $(10)$ Infinitely slow process involving equilibrium states
$(k)$ Intensive property $(11)$ Entropy
$(l)$ Extensive property $(12)$ Pressure
$(13)$ Specific heat

Enthalpy of neutralisation of acetic acid by $NaOH$ is $-50.6 \ kJ/mol$ and the heat of neutralisation of a strong acid with a strong base is $-55.9 \ kJ/mol$. What is the value of $\Delta H$ for the ionisation of $CH_3COOH$ in $kJ/mol$?

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