Exam 2 - Thermochemistry Flashcards
What is thermodynamics?
It is the study of the energy released or used by a chemical reaction
What is the goal of thermodynamics?
To find the amount of heat that is displaced when a reaction takes place
What is Energy?
It is the ability to do work or transfer heat
What is work?
It is the energy that causes an object with mass to move (or stop moving)
What is heat?
It is the energy that causes an object with mass to change temperature (or phase)
How can we classify energy?
Into kinetic and potential
What is kinetic energy?
It is the energy that an object possesses due to it being in motion. If mass an velocity are known, kinetic energy can be quantified
What is kinetic energy’s formula?
Ke=1/2mv2
Potential energy arises from an object’s position relative to others.
True
Chemical energy is a form of…
…Kinetic energy due to the relative position of nuclei and electrons.
In thermodynamics what do we call the object of our study? And everything else?
The system and the surroundings
Systems can only be open.
False, they can be open or closed
Open systems exchange _________ with the surroundins
matter and energy
Closed systems exchange _______with the surroundings
Only energy
Energy can be transferred by
Work or heat
