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Class XI Chemistry Thermodynamics 2
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Question 1
Which of the following statements is correct about heat of combustion–
Question 2
Values of heats of formation for SiO2 and MgO are – 48.4 and – 34.7 kJ respectively. The heat of the reaction
2Mg + SiO2→ 2MgO + Si is -
2Mg + SiO2→ 2MgO + Si is -
Question 3
A steam engine is operating between the temperature 25 ºC and 140 ºC. The maximum efficiency of engine is–
Question 4
When heat is supplied to an ideal gas in an isothermal process, the -
Question 5
Which is the intensive property -
Question 6
H2 + 1/2 O2→H2O ; ΔH = – 68.39 kcal
K+H2O → KOH(aq.)+H2;ΔH= – 48 kcal
KOH + water → KOH (aq.);
ΔH = – 14 kcal
The heat of formation of KOH (in kcal) is–
K+H2O → KOH(aq.)+H2;ΔH= – 48 kcal
KOH + water → KOH (aq.);
ΔH = – 14 kcal
The heat of formation of KOH (in kcal) is–
Question 7
Difference between ΔH and ΔU for the combustion of benzene at 300 K is –
Question 8
Enthalpy of vaporization of water is 40800 J mol–1 at atm pressure. The mountain where, the pressure is 380 mm of Hg, water will boil at–
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