If trial 2 generated 37.49 mL of hydrogen gas at 22.00oC, use 714.4 pressure difference to determine what this volume corresponds to at STP.

V₂ = 24785.5 mL.

Explanation:

Given data:

Initial volume of hydrogen gas = 37.49 mL

Initial temperature = 22.0°C (22 + 273 = 295 K)

Initial pressure = 714.4 atm

Final temperature = 273 K

Final pressure = 1 atm

Final volume of hydrogen gas = ?

Solution;

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

V₂ = P₁V₁T₂  /T₁ P₂

V₂ = 714.4 atm × 37.49 mL × 273 K / 295 K × 1 atm

V₂ = 7311719.7 mL / 295

V₂ = 24785.5 mL.

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.