The First Law of Thermodynamics (6.1.3)

Question 1

• The first law of thermodynamics states that total energy of the universe is
constant.

Answer 1

• The first law of thermodynamics states that total energy of the universe is
constant.

Question 2

• State functions depend only on the current state of a system, not how that state
was reached.

Answer 2

• State functions depend only on the current state of a system, not how that state
was reached.

Question 3

The first law of thermodynamics states that energy
in the universe is neither created nor destroyed; it
just moves around and changes forms.
∆E = q + w means that the change in energy (∆E)
in a system equals the heat (q) produced in the
system added to the work (w) done by the system
on its surroundings.
Heat or work may be done on a system (+) by its
surroundings or may be done upon the
surroundings by the system (-). However, the total
energy of the system plus the surroundings is
constant.
The value of a state function does not depend on
how a state was reached nor on the path or
sequence of events that resulted in reaching that
value.
State functions include the internal energy,
volume, pressure, temperature, enthalpy,
entropy (disorder), and altitude of a system.
Factors that are not state functions include heat (q)
and work (w).

Answer 3

The first law of thermodynamics states that energy
in the universe is neither created nor destroyed; it
just moves around and changes forms.
∆E = q + w means that the change in energy (∆E)
in a system equals the heat (q) produced in the
system added to the work (w) done by the system
on its surroundings.
Heat or work may be done on a system (+) by its
surroundings or may be done upon the
surroundings by the system (-). However, the total
energy of the system plus the surroundings is
constant.
The value of a state function does not depend on
how a state was reached nor on the path or
sequence of events that resulted in reaching that
value.
State functions include the internal energy,
volume, pressure, temperature, enthalpy,
entropy (disorder), and altitude of a system.
Factors that are not state functions include heat (q)
and work (w).