19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
An ideal gas receives 10 J of heat in a reversible isothermal expansion. Then the work done by the gas:
The pressure of a gas is 100 kPa. If it is compressed from 1m3 to 10 dm3, find the work done.
The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm–3, respectively. The standard free energy difference ( G ) is equal to 1895 J mol–1, the pressure at which graphite will be transformed into diamon…
Gaseous system is placed with pressure P₁, volume V₁ and temperature T1, it has undergone thermodynamic changes where temperature is remaining constant, it is
U q w , is mathematical expression for
According to the first law of thermodynamics, U q w . In special cases the statement can be expressed in different ways. Which of the following is not a correct expression?
A system absorb 10 kJ of heat at constant volume and its temperature rises from 27°C to 37°C. The value of ∆U is
Two moles of Helium gas undergo a reversible cyclic process as shown in figure. Assuming gas to be ideal. What is the work done for the process C to D?
An ideal gas expands in volume from 1 × 10–3 to 1 × 10–2 m3 at 300 K against a constant pressure 1 × 105 Nm–2. The work done is
A given mass of gas expands from state A to state B by three paths 1, 2, and 3 as shown in the figure: If w ,w and w respectively, be the work done by the gas along three paths, then (a) w w w (b) w w w
The maximum work obtained by an isothermal reversible expansion of 1 mole of an ideal gas at 27°C from 2.24 to 22.4 L is (R = 2 cal)
Calculate the work done when 1 mol of an ideal gas is compressed reversibly from 1 bar to 4 bar at a constant temperature of 300 K
Calculate the work done when 1 mole of an ideal gas is compressed reversibly form 1 bar to 4 bar at a constant temperature of 300 K.
Molar heat capacity of water in equilibrium with ice at constant pressure is
One mole of an ideal gas expands reversibly and adiabatically from a temperature of 27°C. If the work done during the process is 3 kJ, then final temperature of the gas is:(CV = 20 J/K)
Which one of the following has S greater than zero? (a) CaO s CO g CaCO s (b) NaCl aq NaCl s (c) NaNO s Na aq NO aq (d) N g 3H g 2NH g
G T S when H
G H T S when H S Hence, Correct option is c
Unit of entropy is
In which case change in entropy is negative?
One mole of an ideal diatomic gas (Cv = 5 cal) was transformed from initial 25°C and 1 L to the state when temperature is 100°C and volume 10 L. The entropy change of the process can be expressed as (R = 2 calories/mo…
A reaction has ∆H = – 33 kJ and ∆S = +58 J/K. This reaction would be :
Pick out the wrong statement
For the gas phase reaction, PCl g PCl g Cl g Which of the following conditions are correct?
The state of a thermodynamic system is represented by