introduction

The Nature of Energy
Definition of Energy: The capacity to do work or to produce heat
Energy classification: Potential energy Kinetic energy

Potential Energy: Energy due to position or composition as
• Water behind a dam has potential energy
• The energy released when gasoline is burned results from differences in the attractive forces between nuclei and electrons in the reactants and products.
Kinetic energy: Due to the motion of the object and depends on the mass of the object (m) and its velocity.
Energy Transfer through…
-Work Defined as a force acting over a distance
- Heat :
1.Involves the transfer of energy between two objects due to a temperature difference.
2.NOT a substance contained in an object.
– Heat and temperature are decidedly different.
– Temperature is a property that reflects the random motion of the particles in a particular substance. The temperature of a monatomic ideal gas is an index of the average random translational energy of the gas.
-The science of measuring heat based on observing the temperature change when a body absorbs or discharges energy as heat.
***********A State Function (Property)