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MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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)

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

The work done during the expansion of a gas from a volume of 4dm3 to 6 dm3 against a constant external pressure of 3 atm is

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

1 mole of NH₃ gas at 27°C is expanded in reversible adiabatic condition to make volume 8 times (γ = 1.33). Final temperature and work done by the gas respectively are:

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

In ….. process, work is done at the expense of internal energy.

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

In a reaction, all reactant and products are liquid, then (a) H E (b) H E (c) H E

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

A sample of liquid in a thermally insulated container (a calorimeter) is stirred by a motor. Taking liquid as a system for this process choose the appropriate option:

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

The pressure of a gas is 100 kPa. If it is compressed from 1m3 to 10 dm3, find the work done.

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

16g of oxygen gas expands isothermally and reversibly at 300 K from 10 dm3 to 100 dm3. The work done is (in J)

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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.

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Molar heat capacity of water in equilibrium with ice at constant pressure is

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Gaseous system is placed with pressure P₁, volume V₁ and  temperature  T1,  it  has  undergone  thermodynamic changes where temperature is remaining constant, it is

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

Based on the first law of thermodynamics, which one of the following is correct?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

U q w , is mathematical expression for

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

E is always positive, when

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

An ideal gas is taken around the cycle ABCA as shown in P-V diagram The net work done by the gas during the cycle is equal to:

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

An ideal gas receives 10 J of heat in a reversible isothermal expansion. Then the work done by the gas:

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

One mole of an ideal gas is initially at 0°C and 1 atm pressure. If it absorbs 1000 cal heat during a reversible isothermal expansion, what will be its final volume?

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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)

MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistryThermodynamics and Thermochemistry

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

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