HP 35s

7-4 Solving Equations
Example: Solving the Ideal Gas Law Equation.
The Ideal Gas Law describes the relationship between pressure, volume,
temperature, and the amount (moles) of an ideal gas:
P × V = N × R × T
where P is pressure (in atmospheres or N/m
2
), V is volume (in liters), N is the
number of moles of gas, R is the universal gas constant (0.0821 liter–atm/mole–K
or 8.314 J/mole–K), and T is temperature (Kelvins: K=°C + 273.1).
Enter the equation:
Keys: Display: Description:


Displays the equation.



Solves for T; prompts for
D.



Stores 500 in D; prompts
for V.



Retains 0 in V; prompts
for G.




Retains 9.8 in G; solves
for T.
Keys: Display: Description:
P
_ Selects Equation mode
and starts the equation.



_

 Terminates and displays
the equation.



Checksum and length.