Theromodynamics...

The gas absorbs 100 J heat and is simultaneously compressed by a constant external pressure of 1.50 atm from 8 litres to 2 litres. Hence ΔE will be

A pressure cooker reduces cooking time for food because

A system is changed from state A to state B by one path and from B to A by another path. If ΔE₁ and ΔE₂ are the corresponding changes in internal energy, then -

First four ionization energies of Ni and Pt are given below: 
(IE₁ + IE₂) (IE₃ + IE₄) 
Ni 2.49 × 10³ kJ mol^–1 8.8 × 10³ kJ mol^–1 
Pt 2.66 × 10³ kJ mol^–1 6.7 × 10³ kJ mol^–1 
From the data it can be concluded that

The heat of combustion of sucrose, C₁₂H₂₂O₁₁(s) at constant volume is –1348.9 kcal mol^–1 at 25C, then the heat of reaction at constant pressure, when steam is produced, is

Given the bond energies N ≡ N, H – H and N – H bonds are 945, 436 and 391 kJ mole^–1 respectively, the enthalpy change of the reaction - 
N₂(g) + 3H₂(g) → 2NH₃(g) is -

The enthalpies of combustion of carbon and carbon monoxide are -393.5 and -283 kJ mol^-1 respectively. The enthalpy of formation of carbon monoxide per mole is

In the following table, which are correct– 
ΔH ΔS Nature of reaction