Embibe Experts Solutions for Chapter: Thermodynamics & Thermochemistry, Exercise 1: EXERCISE

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Embibe Experts Chemistry Solutions for Exercise - Embibe Experts Solutions for Chapter: Thermodynamics & Thermochemistry, Exercise 1: EXERCISE

Attempt the free practice questions on Chapter 5: Thermodynamics & Thermochemistry, Exercise 1: EXERCISE with hints and solutions to strengthen your understanding. Practice Book for KVPY Aptitude Test - Stream SA Chemistry solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Chapter: Thermodynamics & Thermochemistry, Exercise 1: EXERCISE with Hints & Solutions

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

The heat of formation of C2H5OHl is -66 kcal/mole. The heat of combustion of CH3OCH3g is -348 kcal/mole. Hf for H2O and CO2 are -68 kcal/mole and -94 kcal/mole respectively. Then determine the ΔH for the isomerisation reaction C2H5OHlCH3OCH3g, and ΔE for the same are at T=25°C.

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

In the reaction, AB2l+3X2gAX2g+2BX2g ΔH=-270 kcal per mol of AB2l, the enthalpies of formation of AX2g & BX2g are in the ratio of 4:3 and have opposite sign. Determine the value of ΔHf0AB2l=+30 Kcal/mole.

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

AB, A2 and B2 are diatomic molecules. If the bond enthalpies of A2, AB & B2 are in the ratio 1:1:0.5 and enthalpy of formation of AB from A2 and B2 is -100 kJ/mol-1. What is the bond enthalpy of A2?

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

When a certain amount of ethylene was combusted, 6226 kJ heat was evolved. If heat of combustion of ethylene is1411 kJ, determine the volume of O2 (at NTP) that entered into the reaction.

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

Given the following reactions:

I: N2g+2O2g2NO2g, ΔHI=16.18 kcal

II: N2g+2O2gN2O4g, ΔHII=2.31 kcal

Which amongst NO2g and N2O4g is more stable?

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

Enthalpy of polymerisation of ethylene, as represented by the reaction, nCH2=CH2-CH2-CH2-n is -100 kJ per mole of ethylene. Given bond enthalpy of C=C bond is 600 kJ mol-1, determine enthalpy of C-C bond (in kJ mol).

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

Substance A2Bg can undergo decomposition to form two sets of products:

Question Image

If the molar ratio of A2g to Ag is 5:3 in a set of product gases, determine then the energy involved in the decomposition of 1 mole of A2B.

MEDIUM
KVPY Aptitude Test - Stream SA
IMPORTANT

For the hypothetical reaction:

A2g+B2g2ABg

If ΔrGo- and ΔrSo- are 20 kJ/mol and -20 JK-1 mol-1, respectively at 200 K. ΔrCp is 20 JK-1mol-1 then determine ΔrH° at 400 K.