Internal Energy & Enthalpy: JEE Questions & Solutions

Which of the following graphs between pressure p versus volume V represents the maximum work done?

Match the LIST-I with LIST-II | LIST-I (Thermodynamic Process) | LIST-II (Magnitude in kJ) | |---|---| | (A) Work done in reversible,…

A cup of water at 5^° C (system) is placed in a microwave oven and the oven is turned on for one minute during which the water begins to…

Match the LIST-I with LIST-II for an isothermal process of an ideal gas system. List-I List-II Work done (V_f > Vᵢ) A. Reversible expansion…

20.0 dm³ of an ideal gas X at 600 K and 0.5 MPa undergoes isothermal reversible expansion until the pressure of the gas becomes 0.2 MPa.…

A liquid when kept inside a thermally insulated closed vessel at 25^°C was mechanically stirred from outside. What will be the correct…

Match List - I with List - II | List - I (Partial Derivatives) | List - II (Thermodynamic Quantity) | |---|---| | (A) ((∂ G)/(∂ T))_P | (I)…

The bond dissociation enthalpy of X₂ calculated from the given data is kJ mol⁻¹ (nearest integer). Given: M⁺X⁻(s) → M⁺(g) + X⁻(g), Δ…

Which of the following mixing of 1 M base and 1 M acid leads to the largest increase in temperature?

An ideal gas undergoes a cyclic transformation starting from point A and coming back to the same point by tracing the path A→B→C→D→A as…

500 J of energy is transferred as heat to 0.5 mol of Argon gas at 298 K and 1.00 atm. The final temperature and the change in internal…

Two vessels A and B are connected via stopcock. Vessel A is filled with a gas at a certain pressure. The entire assembly is immersed in…

Which of the following properties will change when system containing solution 1 will become solution 2 ? Solution 1: 10 mol of solute x +…

Given below are two statements: Statement I: When a system containing ice in equilibrium with water (liquid) is heated, heat is absorbed by…

A perfect gas (0.1 mol) having C_V = 1.50 R (independent of temperature) undergoes the above transformation from point 1 to point 4. If…

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…

One mole of an ideal gas expands isothermally and reversibly from 10 dm³ to 20 dm³ at 300 K. Δ U, q and work done in the process…

Consider the given data: (a) HCl(g) + 10H₂O(l) → HCl.10 H₂O Δ H = -69.01 kJ/mol⁻¹ (b) HCl(g) + 40H₂O(l) → HCl.40 H₂O Δ H = -72.79 kJ/mol⁻¹…

Total enthalpy change for freezing of 1 mol water at 10^° C to ice at -10^° C is (Given: Δ_fusH = x kJ/mol, C_p[H₂O(l)] = y J mol⁻¹ K⁻¹,…

The hydration energies of K⁺ and Cl⁻ are -x and -y kJ/mol respectively. If lattice energy of KCl is -z kJ/mol, then the heat of solution of…

The correct statement amongst the following is:

If three moles of an ideal gas at 300 K expand isothermally from 30 dm³ to 45 dm³ against a constant opposing pressure of 80 kPa, then the…

Standard enthalpy of vaporization for CCl₄ is 30.5 kJ/mol. Heat required for vaporization of 284 g of CCl₄ at constant temperature is:

An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path A → B → C →…

One mole of an ideal monatomic gas is subjected to the changes 1 → 2 → 3 → 1 plotted on a pressure (in bar) versus volume (in L) diagram,…

An athlete is given 100 g of glucose (C₆H₁₂O₆) for energy, which is equivalent to 1800 kJ of energy. If 50% of this energy is utilized for…

When 2 liters of ideal gas expands isothermally into a vacuum to a total volume of 6 liters, the change in internal energy is J. (Nearest…

1 mole of ideal gas is allowed to expand reversibly and adiabatically from a temperature of 27^° C. The work done is 3 kJ mol⁻¹. The final…

Enthalpies of formation of CCl₄(g), H₂O(g), CO₂(g) and HCl(g) are -105, -242, -394, and -92 kJ/mol respectively. The magnitude of enthalpy…

0.3 g of ethane undergoes combustion at 27^° C in a bomb calorimeter. The temperature of calorimeter system (including the water) is found…

When a 60 W electric heater is immersed in a gas for 100 s in a constant volume container with adiabatic walls, the temperature of the gas…