Retro (Past 13 Years) IIT - JEE Advanced (Thermodynamics) - JEE MCQ

The standard enthalpies of for mation of CO₂(g), H₂O (l) and glucose (s) at 25°C are - 400 kJ / mol, - 300 kJ / mol and - 1300 kJ / mol, respectively .

The standard enthalpy of combustion per gram Of glucose at 25°C is

(2013 Adv., Single Option Correct)

Using the data provided, calculate the multiple bond energy (kJ mol^-1) of a  That energy is (take the bond energy of a C—H bond as 350 kJ mol -1)

(2012 , Single Option Correct)

Match the trans formation in Column I with appropriate options in Column II.

One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as shown in the graph below, If the work done along the solid line path is Ws and that along the dotted line path is W_d , then the integer closest to the ratio W_d / W_s is

Direction (Q. Nos. 8-9) These questions are based on Statement I and Statement II. Select the correct answer from the codes given below.

Q.

Statement I : For every chemical reaction at equilibrium , standard Gibbs ’ energy of reaction is zero.

Statement II : At constant temperature and pressure, chemical reactions are spontaneous in the direction of decreasing Gibbs ’ energy .

Satement I : There is a natural asymmetry between converting work to heat and converting heat to work.

Statement II : No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.

(2008, Statement Type)

For the process H₂O (l) (1 bar, 373 K) → H₂O (g) (1 bar, 373 K), the correct set of thermodynamic parameters is

(2007, Single Option Correct)

The value of log₁₀ K for a reaction,   is

 and 
R = 8.314 JK^-1 mol^-1; 2 .303 x 8.314 x 298 = 5705)

(2007, Single Option Correct)

The direct conversion of A to B is difficult, hence it is carried out by the following shown path

where eu is entropy unit

(2006, Single Option Correct)

A monatomic ideal gas undergoes a process in which the ratio of p to V at any instant is constant and equals to 1. What is the molar heat capacity of the gas ?

One mole of monatomic ideal gas expands adiabatically at initial temperature T against a constant external pressure of 1 atm from 1 L to 2 L. Find out the final temperature (R = 0.0821 Latm K^-1 mol^-1)

(2005, Single Option Correct)