Reaction,
According to this, heat of formation of HI will be
The work done by a closed system in a reversible process is always ___ that done in an irreversible process.
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In which of the following neutralization reactions, the heat of neutralization will be highest ?
The enthalpies of combustion of C(graphite) and C(diamond) are —393.5 and —395.4 kJ/mol respectively. The enthalpy of conversion of C(graphite) to C(diamond) in kJ/mol is
When 10 mL of a strong acid is added to 10 mL of an alkali, the temperature rises by 50C. If 100 mL of the
same acid is mixed with 100 mL of the same base, the temperature rise would be
Which of the following reactions defines ?
Calorific value of hydrogen gas is —143 kJ g—1. The standard enthalpy of formation of H2O will be
The standard enthalpies of combustion of C(graphite) and H2 (g) are respectively —3270 kJ
mol—1, —394 kJ mol—1 and —286 kJ mol—1. What is the
standard enthalpy of formation of in kJ mol—1 ?
Match the column I with column II and mark the appropriate choice.
At 25° C and 1 bar which one of the following has a non-zero ?
The enthalpy of atomisation of CH4 and C2H6 are 360 and 620 kcal mol–1 respectively. The C – C bond energy is expected to be
When 1 mole of oxalic acid is treated with excess of NaOH in dilute aqueous solution, 106 kJ of heat is
liberated. Predict the enthalpy of ionization of the acid
The favourable condition for a process to be
spontaneous is
The reaction is spontaneous under standard conditions. Which of the following statements
must be true ?
I. The reaction is non-spontaneous under standard conditions.
II. A(g) will be completely converted to B(g) if sufficient time is allowed.
III. A(g) will be completely converted to B(g) rapidly
ΔG0 for a reaction is 46.06 kcal/mole, Kp for the reaction at 300 K is
For the given reactions
It may be concluded that
If an endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its
boiling point, then
Considering entropy (S) is a thermodynamic parameter, the criterion for the spontaneity of any process is
If DfH0 (C, diamond) = 1.89 kJ mol–1, S0(C, diamond) = 2.38 J K–1 mol–1 and S0(C, graphite) = 5.74 J K–1
mol–1, then the transformation
C(diamond)→ C(graphite)
Given :
which one of the following is true ?