Energetics Flashcards
What is an exothermic reaction?
When energy transferred from the system to the surrounding
In other words he is given out
Exothermic reactions, positive or negative
Negative
In an exothermic reaction diagram is the reactants at the top of the products
Reactants
What does endothermic reaction mean?
When energy is transferred from the surroundings to the system
In other words, energy is taken in
End reaction is
positive
V in a reaction profile is the product at the top of the reactants
Products
Define enthalpy
Heat energy change measured under the conditions of a constant pressure
What does standard anthropology changes referred to?
The standard conditions which are 100 KP2 198K and all substances should be in normal states
What is the standard entropy change formation?
It is the entropy change when one mole of a compound is formed from its elements understanding conditions and all reactants and products are in their standard states
What does standard enthalpy change of combustion mean?
It is the empathy change which occurs in one mole of a substance is combusted completely in oxygen under standard conditions and all reactants and products are in their standard states
What does incomplete combustion lead to?
Soot carbon monoxide and water
What is the calorimetric method?
Q equals M C AT
What is Hess’s law?
The total entropy change for a reaction which is independent of the root taken
What is the formula to determine the enthalpy change for enthalpy change of formation?
Products minus reactants
During formation, what is a standard entropy for elements?
Zero
