EASY
Diploma
IMPORTANT
Earn 100
Write equation to describe the standard enthalpy change of combustion for methanoic acid, .
Important Questions on Energetics and Thermochemistry
EASY
Diploma
IMPORTANT
Write equation to describe the standard enthalpy change of combustion for glucose, .
EASY
Diploma
IMPORTANT
Hess's law can be considered an application of the law of conservation of energy. What are the challenges in applying general principles of a law to something as specific as Hess's law?
MEDIUM
Diploma
IMPORTANT
In the chlor-alkali industry chlorine gas is combined with hydrogen gas to produce hydrogen chloride as . If the enthalpy change for this reaction is , calculate the bond enthalpy for the bond. Bond enthalpies of and are and respectively.
EASY
Diploma
IMPORTANT
Methane and chlorine react to produce chloromethane and hydrogen chloride. Write the balanced chemical equation for this reaction.
MEDIUM
Diploma
IMPORTANT
Methane and chlorine react to produce chloromethane and hydrogen chloride. Using bond enthalpy values from the below table, determine the enthalpy change for this reaction.
| Bond | ||||
| Average bond enthalpy/ |
EASY
Diploma
IMPORTANT
Methane and chlorine react to produce chloromethane and hydrogen chloride. The value of enthalpy change for this reaction is found to be . Deduce whether this reaction is exothermic or endothermic.
EASY
Diploma
IMPORTANT
Methane and chlorine react to produce chloromethane and hydrogen chloride. The value of enthalpy change for this reaction is found to be . Which are more energetically stable, the reactants or the products?
EASY
Diploma
IMPORTANT
Consider the specific heat capacity of the following metals. Which metal will show the greatest temperature increase if of heat is supplied to a sample of each metal at the same initial temperature?
| Metal | Specific heat Capacity |
