Compound having large heat of formation is_____________________?

Related Mcqs:

1. The amount of heat required to decompose a compound into its elements is _____________ the heat of formation of that compound from its elements?

   A. Less than
   B. More than
   C. Same as
   D. Not related to

2. Heat requirement for decomposition of a compound into its elements is _____________ that is evolved during the formation of that compound from its elements?

   A. The same
   B. Less than
   C. Greater than
   D. Different than

3. “The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?

   A. Law of Petit and Dulong
   B. Kopp’s rule
   C. Nernst heat theorem
   D. Trouton’s rule

4. The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?

   A. 100,000 kW
   B. 160,000 kW
   C. 200,000 kW
   D. 320,000 kW

5. Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the__________________?

   A. Calorific value
   B. Heat of reaction
   C. Heat of combustion
   D. Heat of formation

6. Molar heat capacity of water in equilibrium with ice at constant pressure is_____________________?

   A. 0
   B. ∞
   C. 1
   D. None of these

7. Heat of formation of an element in its standard state is___________________?

   A. 0
   B. 0
   D. A function of pressure

8. The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ΔH = – 394 kJ/kg .mole CO + ½ O2 = CO2, ΔH = – 284.5 kJ/kg. mole. The heat of formation of CO is _____________ kJ/kg. mole?

   A. -109.5
   B. +109.5
   C. +180
   D. +100

9. Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of _____________________?

   A. Sublimation
   B. Fusion
   C. Transition
   D. Vaporisation

10. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by__________________?

    A. T1/(T1-T2)
    B. T2/(T1-T2)
    C. T1/T2
    D. T2/R1