
Concept explainers
(a)
Interpretation: The heat released during the reaction of 4.00 moles of iron to react with excess of O2 for the given reaction needs to be determined.
Concept Introduction:
(a)

Answer to Problem 35E
Energy released = 1652 kJ
Explanation of Solution
Given reaction:
According to given reaction; 4 moles of Fe react to release 1652 kJ energy.
(b)
Interpretation: The heat released during the reaction of 1.00 moles of
Concept Introduction: Thermodynamic is a branch of chemistry that deals with the energy change with the system and surroundings. It indicates the energy conversion and transfer between system and surroundings. At constant volume the change in heat for a system to change the internal energy is represented as ΔE or qV. At constant pressure the change in heat for a system to change the enthalpy is represented as ΔH or qp. The relation between
(b)

Answer to Problem 35E
Energy released =
Explanation of Solution
Given reaction:
Moles of
According to given reaction; 2 moles of
(c)
Interpretation: The heat released during the reaction of 1.00 g of
Concept Introduction: Thermodynamic is a branch of chemistry that deals with the energy change with the system and surroundings. It indicates the energy conversion and transfer between system and surroundings. At constant volume the change in heat for a system to change the internal energy is represented as ΔE or qV. At constant pressure the change in heat for a system to change the enthalpy is represented as ΔH or qp. The relation between
(c)

Answer to Problem 35E
Energy released =
Explanation of Solution
Given reaction:
Mass of Fe = 1.00 g
Molar mass of Fe = 55.8 g/mol
Calculate moles of Fe =
According to given reaction; 4 moles of Fe reacts to release of 1652 kJ energy. Hence for 0.0179 moles the energy must be:
(d)
Interpretation: The heat released during the reaction of 10.0 g of
Concept Introduction: Thermodynamic is a branch of chemistry that deals with the energy change with the system and surroundings. It indicates the energy conversion and transfer between system and surroundings. At constant volume the change in heat for a system to change the internal energy is represented as ΔE or qV. At constant pressure the change in heat for a system to change the enthalpy is represented as ΔH or qp. The relation between
(d)

Answer to Problem 35E
Since less energy is released from
Explanation of Solution
Given reaction:
Mass of Fe = 10.0 g
Molar mass of Fe = 55.8 g/mol
Calculate moles of Fe =
Molar mass of
Calculate moles of
According to given reaction; 4 moles of Fe reacts to release of 1652 kJ energy. Hence energy from both given reactants:
Since less energy is released from
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Chapter 9 Solutions
Chemical Principles
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