# Mol Calculator Lite

Mol calculator is a calculation sheet that solves chemical mol calculation problems.Mol Calculator Lite is a Lite version of the Mol Calculator software. This can operate the P button up to 3 times. When 10 minutes pass and the software is resumed, the P button can be used again. A typical problem is as follows.(Example)The hydrogen gas used for a fuel cell is generated from aluminum powder particles and water. (1) When the temperature is 20 and the pressure is 1 atmosphere, how much liters of hydrogen gas can be generated from 1 g of aluminum? (2) When the gas is generated in a closed container of 0.1 liter at the temperature of 20 , how much is the pressure of hydrogen gas?(1)Volume calculationMol calculator solves the problem in the following three steps.//Step 0: Preparation//Prepare chemical equations and atomic (molecular) weights. They are basics for the calculation.They are as follows.2Al + 6H2O -> 2Al(OH)3 + 3H2Atomic weight of Al = 27 [g/mol]Molecular weight of H2 = 2 [g/mol]//Step 1: Definition//Enter known data into the Mol sheet.Rows correspond to substances. Columns correspond to the attributes of substance.First rowName = Al, Coef = 2, Aw = 27, W = 1Second rowName = H2, Coef = 3, Aw = 2, T = 20[C], p = 1[atm]//Step 2: Calculation//Attribute 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_W button of the first row. Mol data are changed to known data.Touch out P_Mol button of the second row. Vol data are changed to known data.It turns out that the volume of hydrogen gas is 1.3 L.(2)Pressure calculationChange PresVol mode to pressure mode.//Step 1: Definition//Enter the following data.First rowName = Al, Coef = 2, Aw = 27, W = 1Second rowName = H2, Coef = 3, Aw = 2, T = 20[C], Vol = 0.1[L]//Step 2: Calculation//Touch out buttons as follows.Touch out P_W button of the first row. Mol data are changed to known data.Touch out P_Mol button of the second row. Pres data are changed to known data.It turns out that the pressure of hydrogen gas is 13.36 atmospheres.[Data label] Name: Substance name (option).Coef: Substance coefficient of chemical equation. This defines quantity ratio among substances.When a chemical equation is aX + bY -> cZ, then a, b, and c are coefficients.When the Coef text of the data field is not numeric, it is interpreted as zero value.Aw [g/mol]: Atomic or molecular weight of substancen [mol]: Mol quantity of substance.W [g]: Weight of substance.StdVol [L]: Gas volume of substance at 0 deg C and 1 atm.T [C][F]: Temperature.p [atm][kPa][mmHg]: Gas 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. 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 button//C (Clear) button clears all row 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 colorReferenced data:Yellow colorOutput data:Green colorUncalculated data:Red color[Formulae]Embedded formulae are as follows.n = W / AwStdVol = 22.414 x nStdVol /273.15 = p x Vol / (T + 273.15)n(1)/Coef(1) = n(2)/Coef(2) = n(3)/Coef(3) = n(4)/Coef(4) = n(5)/Coef(5)