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. Choose the correct answer from the options given below:

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. array|c|l||c|l| List-I & & List-II & Work done (Vf Vi) A. &…

20.0 dm^3 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)

The bond dissociation enthalpy of X2 calculated from the given data is kJ mol^-1 (nearest integer). % Given Data: M(s) + X(s) M^+(g) +…

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 ?

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 CV = 1.50 R (independent of temperature) undergoes the above transformation from point 1 to point 4. If each…

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 dm^3 to 20 dm^3 at 300 K. U, q and work done in the process…

Consider the given data: (a) HCl(g) + 10 H2 O(l) HCl.10 H2 O H = -69.01 kJ/mol^-1 (b) HCl(g) + 40 H2 O(l) HCl.40 H2 O 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: fusH = x kJ/mol, Cp[H2O(l)] = y J mol^-1 K^-1, and…

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…

The correct statement amongst the following is:

If three moles of an ideal gas at 300 K expand isothermally from 30 dm^3 to 45 dm^3 against a constant opposing pressure of 80 kPa, then…

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

Standard enthalpy of vaporization for CCl4 is 30.5 kJ mol^-1. Heat required for vaporization of 284 g of CCl4 at constant temperature is:

One mole of an ideal monatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the…

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(l), 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…