HARD
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Given that the reduced temperature, θ=TTC the reduced pressure, π=FFC the reduced volume, ϕ=VVC
Thus, it can be said that the reduced equation of state may be given as-

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Important Questions on States of Matter

MEDIUM
The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aqueous solutions of KCl, CH3OH  and CH3CH211OSO3- Na+ at room temperature. The correct assignment of the sketches is -

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MEDIUM
Given, van der Waal's constant for NH3, H2, O2 and CO2 are respectively 4.17, 0.244, 1.36 and 3.59. Which one of the following gases is most easily liquefied?
EASY
A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is:
(Latent heat of ice is 3.4×105J kg-1 and g=10N kg-1)
HARD
A reversible cyclic process for an ideal gas is shown below. Here, P, V, and T are pressure, volume and temperature, respectively. The thermodynamic parameters q, w, H and U are heat, work, enthalpy and internal energy, respectively.

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The correct option(s) is (are)
EASY

Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A:SO2( g) is adsorbed to a large extent than H2( g) on activated charcoal.

Reason R : SO2( g) has a higher critical temperature than H2( g)

In the light of the above statements, choose the most appropriate answer from the options given below.

MEDIUM

The combination of plots which does not represent isothermal expansion of an ideal gas is

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(B) Question Image

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EASY

The number of statement's, which are correct with respect to the compression of carbon dioxide from point (a) in the Andrews isotherm from the following is _________.

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A. Carbon dioxide remains as a gas upto point (b)
B. Liquid carbon dioxide appears at point (c)
C. Liquid and gaseous carbon dioxide coexist between points (b) and (c)
D. As the volume decreases from (b) to (c), the amount of liquid decreases 

EASY
The work done during combustion of 9×10-2 kg of ethane, C2H6(g) at 300 K is (Given R=8.314 JK1mol1 , atomic mass C=12,H=1 )
MEDIUM
Given the critical temperature and critical pressure of CO2 gas are 30°C and 72 atm respectively, find the approximate values of Van der Waals constants 'a' (in L2. atm. mol-2) and 'a' (in L. mol-1).
EASY

Among the following gases, the order of liquefiability is
a) SO2
b) CO2
c) CH4
d) NH3

HARD
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The above P-V diagram represents the thermodynamic cycle of an engine, operating with an ideal mono-atomic gas. The amount of heat, extracted from the source in a single cycle, is:
EASY
According to Andrews isothermal at what temperature the carbon dioxide gas starts to condense at 73 atmosphere?
MEDIUM
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 3 7 . 0 C. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be 
(R = 8.314 J/mol K) (ln7.5 = 2.01)
HARD
An ideal gas undergoes isothermal compression from 5 m3 to 1 m3 against a constant external pressure of 4 N m-2. The heat released in this process is 24 J mol-1K-1 and is used to increase the pressure of 1 mole of Al. The temperature of Al increases by:
MEDIUM
A system consisting of 1 mol of an ideal gas undergoes a reversible process, ABCA (schematically indicated in the figure below). If the temperature at the starting point A is 300 K and the work done in the process BC is 1 L atm, the heat exchanged in the entire process in L atm is

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MEDIUM
X g of ice at 0oC is added to 340g of water at 20oC . The final temperature of the resultant mixture is 5oC . The value of X (in g) is closest to

[Heat of fusion of ice =333 J/g ; Specific heat of water =4.184 J/g.K ]
EASY
Calculate the work done during compression of 2 mol of an ideal gas from a volume of 1m3 to 10 dm3 at 300 K against a pressure of 100 kPa.
EASY

Which of the following gases can be absorbed in more proportion?

MEDIUM
The critical temperatures of four gases K,L,M and N are 154.3 K,5.3 K,33.2 K and 126 K respectively. Which of these gases will liquify first if they start cooling from 500 K to their critical temperatures?
MEDIUM
Consider the van der Waal's constants, a and b, for the following gases.
Gas Ar Ne Kr Xe
a/(atm dm6 mol-2) 1.3 0.2 5.1 4.1
b/(10-2 dm3 mol-1) 3.2 1.7 1.0 5.0

Which gas is expected to have the highest critical temperature?