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Boyle Charles Calculator is a calculation sheet that solves a gas problem of volume, pressure, and temperature. This Boyle Charles Calculator is a subset of iPad Mol Calculator software.

A typical problem is as follows.

(Example)

There is 0.05 mol of hydrogen gas.

(1)When the temperature is 20 ℃ and the pressure is 1 atmosphere, how much liters is the gas ?

(2)When the temperature is 20 ℃ and the gas is packed in a 0.1-liter container, how much is the pressure of hydrogen gas?

(1)Volume calculation

Boyle Charles Calculator solves the problem in the following three steps.

//Step 0: Preparation//

Gather known data.

//Step 1: Definition//

Enter known data into the BC sheet.

Mol = 0.05, T = 20[C], p = 1[atm]

//Step 2: Calculation//

Data are not independent but mutually related by formulae.

Calculation is a conversion from unknown data to known data using the formulae.

The formulae are embedded in P and G buttons.

Touching out those buttons executes the formulae and changes unknown data to known data.

Touch out buttons as follows.

Touch out P_Mol button. StdVol and Vol data are changed to known data.

It turns out that the volume of hydrogen gas is 1.2 L.

(1)Pressure calculation

//Solution by V1.00//

Use the above results.

Enter the following data

Vol = 0.1[L]

Touch out G_Pres button. Pressure data are changed to known data.

It turns out that the gas pressure is 12.02 atmospheres.

//Solution by V2.00//

Change PresVol mode to pressure mode.

//Step 1: Definition//

Enter the following data.

Mol = 0.05, T = 20[C], Vol = 0.1[L]

//Step 2: Calculation//

Touch out P_Mol button. StdVol and Pres data are changed to known data.

It turns out that the gas pressure is 12.02 atmospheres.

[Data label]

n [mol]: Mol quantity of substance.

StdVol [L]: Gas volume of substance at 0 deg C and 1 atm.

T [C][F]: Temperature.

p [atm][kPa][mmHg]: Pressure

Vol [L]: Gas volume of substance at the temperature T and at the pressure p.

[Buttons and data]

//P button and P data group//

P (put) button inputs data to which the P button is assigned.

P data group is a group of data to which the P buttons are assigned. The P data group has a special character. When one P data is input, all other data of the P data group are updated by formulae.

//G button//

G (get) button gets data from other data using formulae.

//C butto//

C (Clear) button clears all data.

//PresVol button//

Either pressure data or volume data belongs to P button data group.

The PresVol button specifies pressure mode or volume mode.

[Color change]

Color change shows what data are input, output, or referenced data in this button execution.

Input data:Blue color

Referenced data:Yellow color

Output data:Green color

Uncalculated data:Red color

[Formulae]

Embedded formulae are as follows.

StdVol = 22.414 x n

StdVol /273.15 = p x Vol / (T + 273.15)