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A + B + Heat → C, ΔH > 0
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What is the thermochemical equation for the formation of 1.00 mol of liquid water?
H2 + 1/2o2 --> h2o
What equation indicates an endothermic equation?
An endothermic reaction occur with heat absorption.
Does the chemical equation of ATP release exergonic exothermic or absorb energy endergonic endothermic?
Releases energy. Exergonic.
What phase changes are exothermic and what phase changes are endothermic?
exothermic: when the reactants can convert potential energy (stored energy) into kinetic energy. flow of energy into surroundings, surroundings get warmer. the reactants have more energy that the products. energy is lost. the change in enthalpy is negative. the energy sign is on the right side of the arrow (in the equation). exothermic reactions are bond forming endothermic: reactants convert kinetic energy into potential energy during the formation of the products. causes a decrease in temp of the surroundings because it is drawing the heat from it. products have more energy than the reactants. energy is gained. change in enthalpy is positive. the energy sign is on the left side of the arrow (in the equation). endothermic reactions are bond breaking note - enthalpy is another term for potential energy or heat content, the words can be used interchangeably
What is thermochemical analysis?
This is the study of heat released/absorbed during chemical reactions.
What type of reaction is shown in this thermochemical equation A plus B plus Heat -- C plus D?
endothermic
What is the difference between a thermochemical equation and a traditional chemical equation?
Thermochemical equation includes enthalpy ( ΔH ) change in it.
What important information does a thermochemical equation have that a regular balanced equation does not?
A thermochemical equation shows the amount of heat given out or taken in when the reaction occurs. CH4 + 2O2 = CO2 +2H2O, deltaH = -890 kJ/mol Note delta H is negative when heat is given out, exothermic and +ve when endothermic. Sorry can't do delta symbol - its a triangle!
What is the sign convention used in thermochemical calculations?
Exothermic (negative) and endothermic (positive)
What important information does thermochemical equation have that a regular balanced equations does not?
A thermochemical equation shows the amount of heat given out or taken in when the reaction occurs. CH4 + 2O2 = CO2 +2H2O, deltaH = -890 kJ/mol Note delta H is negative when heat is given out, exothermic and +ve when endothermic. Sorry can't do delta symbol - its a triangle!
What information is given in a thermochemical equation?
thermochemical equations show the accompanying heat of reaction at constant pressure
The change in energy represented by a thermochemical equation is always?
The change in energy represented by a thermochemical equation is directly proportional to the number of moles in substances undergoing a change.
How is thermochemical equation different from a balanced chemical equation?
They specify heat flow for the reaction.
What is the thermochemical equation for the formation of 1.00 mol of liquid water?
H2 + 1/2o2 --> h2o
What equation indicates an endothermic equation?
An endothermic reaction occur with heat absorption.
What is heat included in the equation of an endothermic reaction?
The heat in an endothermic reaction is included as a reactant on the left side of the equation, and has a positive value.
What is heat included in equation of an endothermic reaction?
The heat in an endothermic reaction is included as a reactant on the left side of the equation, and has a positive value.
