JEE Main Chemistry · Thermodynamics (Chemistry)

Bomb Calorimetry Calculations

Bomb Calorimetry Calculations (Thermodynamics (Chemistry)) was asked 3 times in 3 JEE Main shifts, 2023–2026, out of the 42 shifts Lumi analysed. 3 of the 3 had a numerical answer.

Times asked: 3; in 3 shifts
Years: 2023–2026
Usual format: Numerical value; Multi-step
Pattern: Frequent; repeats across shifts

How it is asked

Enthalpy of formation from bomb calorimetry
Heat of combustion from calorimeter

Difficulty

Easy 0Medium 2Hard 1

Where it sits

Chapter: Thermodynamics (Chemistry). Topic: Enthalpy and Hess's Law, 24 questions over 14 ideas.

All 3 questions

Newest first, each with its options and official answer.

4 Apr 2026, Shift 2 · Q71If 3.365 g of ethanol ( $l$ ) is burnt completely in a bomb calorimeter at 298.15 K, the heat produced is 99.472 kJ. The…HardNumerical value
3 Apr 2025, Shift 2 · Q72A sample of n-octane (1.14 g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ…MediumNumerical value
8 Apr 2023, Shift 2 · Q83For complete combustion of ethene, $\mathrm{C_2H_4(g) + 3O_2(g) \rightarrow 2CO_2(g) + 2H_2O(l)}$ the amount of heat produced as measured…MediumNumerical value