Hess's Law, Big Mama, Heat Of
Formation, Bond Energy Questions And
Answers With Verified Solutions Already
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Hess's Law definition - ANSWER✔✔States that regardless of the multiple stages
or steps of a reaction, the total enthalpy change for the reaction is the sum of all
changes.
The purpose of Hess's Law - ANSWER✔✔To determine the enthalpy change of a
reaction.
Rules to remember about Hess's Law - ANSWER✔✔When you reverse a chemical
equation, change the sign of ∆H. When you multiply or divide the coefficients of a
chemical equation, ∆H is multiplied/divided by the same number.
What is Big Mama equation used for? - ANSWER✔✔Enthalpy of the reaction is
equal to the enthalpy of the products minus the enthalpy of the reactants.
what is the Big Mama equation - ANSWER✔✔Delta G= Sum G(products) - Sum
G(reactants), also known as, ∆Hrxn = ∑∆Hf (products) - ∑∆Hf (reactants)
Define heat of formation - ANSWER✔✔Enthalpy of formation ( ΔHf ) is the
enthalpy change for the formation of 1 mol of a compound from its component
elements.
define bond energy - ANSWER✔✔The amount of energy required to break apart a
mole of molecules into its component atoms. It is a measure of the strength of a
chemical bond. Bond energy is also known as bond enthalpy (H) or simply as bond
strength.
what is the equation for bond energy - ANSWER✔✔ΔH = ∑H(bonds broken) -
∑H(bonds formed)
heat of formation equation - ANSWER✔✔elements→compound ΔHrxn=ΔHf
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