Energy and the First Law of Termodynamics

Question 1

Kinetic Energy

Answer 1

When the body is accelerated by the resultant force, the work done on the body can
be considered a transfer of energy to the body, where it is stored as kinetic energy. It is a property of the body and is an extensive property.

Question 2

Gravitational Potential Energy

Answer 2

Potential energy is associated with the force of gravity and is therefore an attribute
of a system consisting of the body and the earth together. It is an extensive property.

Question 3

Thermodynamic definition of work

Answer 3

Work is a means for transferring energy. Accordingly, the term work does not refer
to what is being transferred between systems or to what is stored within systems.
Energy is transferred and stored when work is done.
W done by system (+)
W done on system (-)
Work is not a property it depends on the details of the interactions.

Question 4

Power

Answer 4

• The rate of energy transfer by work.
• When a work interaction involves a macroscopically observable force, the rate
  of energy transfer by work is equal to the product of the force and the velocity at
  the point of application of the force.

Question 5

quasiequilibrium process

Answer 5

The process is one in which the departure from thermodynamic equilibrium is at most infinitesimal. All states through which
the system passes in a quasiequilibrium process may be considered equilibrium states.

Question 6

Polytropic Process

Answer 6

A quasiequilibrium process described by

pV^n isconstant, or pv^n is constant, where n is a constant