Enthalpy Flashcards
What is enthalpy?
= all of the heat energy that is stored in a chemical system
= chemicals present in a reaction
What do scientists determine?
= enthalpy change as itself is difficult to find
How do we calculate entahlpy change?
= enthalpy of the products minus the enthalpy of the reactants
What is an exothermic reaction?
= heat energy was released from the chemical system to the surroundings
Does breaking chemical bonds releases or needs energy?
= requires energy
= endothermic
Does making bonds releases or needs energy?
= releases energy
= exothermic
What is the activation energy?
= minimun energy required for a reaction to sucessfuly take place
= enthalpy of the reactants to the peak of the curve
What is an endothermic reaction?
= chemical system has taken in heat from the surroundings
