Thermodynamics ...

The difference between Δ_rH° and Δ_rE° (in kcal) for the reaction

at 298 K in kcal is

The Δ_rH° for CO₂(g), CO(g) , and H₂O(g) are - 393.5°, - 110.5 and - 241.8 kJ mol^-1, respectively. Thus, Δ_rH° for the reaction (in kJ)

[IITJEE 2000]

Enthalpies of formation of CO(g) , CO₂ (g) , N₂O (g) and N₂O₄ (g) are -110, - 393, 81 and 9.7 kJ mol^-1. Thus, Δ_rU for the reaction at 298 K is,

Given

Q. Thus, heat of formation of CH₃OH(/)is

Hot carbon reacts with steam to produce an equimolar mixture of CO(g)and H₂(g) known as water gas

Q. 
Energy released , if water gas is used as fuel is

For a gaseous phase reaction

When equilibrium is set up, K = 0.33
Energy involved (in kJ) is

One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 L, 95 K) → (4.0 atm, 5.0 L, 245 K) with a change in internal energy, Δ_rE° = 30.0 L atm. The change in enthalpy (Δ_rH°) of the process in L-atm is

[IIT JEE 2002]

Which of the following reactions defines Δ_fH° ?

Ethanol can undergo decomposition to form two sets of products

Q.
if the molar ratio of C₂H₄ to CH₃CHO is 8 : 1 in a set of product gases, then, energy involved in the decomposition process is

Direction (Q. No. 10) This sectionis based on statement I and Statement II. Select the correct answer from the code given below.

Q.

Statement I : Based on the following thermodynamic data
    

NO₂ is more stable than NO.

Statement II : NO (g) is an endothermic compound while, NO₂(g) is an exothermic compound.

Among the following enthalpies, which is always less than zero?

The solubility of fluorides is much less as compared to corresponding chlorides

Direction (Q. Nos. 13-15) This section contains a paragraph, wach describing  theory, experiments, data etc. three Questions related to paragraph have been  given.Each question have only one correct answer among the four given  ptions  (a),(b),(c),(d).

Based on the following thermodynamic data,

Q. Which oxidising agent will generate the greatest amount of energy per mole of H₂(g)?

Based on the following thermodynamic data,

Q. Which oxidising agent will generate the greatest amount of energy per gram of oxidising agent?

Based on the following thermodynamic data,

Q. On the total mass basis of reactants, which reaction will generate the greatest amount of heat?

Direction (Q. Nos. 16 - 18) This section contains 3 questions. when worked out will result in an integer from 0 to 9 (both inclusive).

Q. How much heat (in kcal) is required to convert 36 g of diamond into graphite?

Based on the following reactions,

Q. Heat of formation of NO₂ (in kcal) is ........

How many of the following has zero standard molar enthalpy of the formation at 298 K?

[IIT JEE 2010]