Ammonium nitrite, NH4NO2, decomposes upon heating to form N2 gas: NH4NO2 (s) → N2 (g) + 2H2O (l) When a sample of NH4NO2 (Molar mass = 64.02 g per mol) is decomposed in a test tube, 511 cm3 of N2 gas is collected over water at 26 ºC. The total pressure is 99.3 kPa and the water vapor pressure at 26 ºC is 3.33kPa.

How many grams of NH4NO2 are decomposed?

Give your answer correct to three significant figures.

R = 0.08205 L·atm/mol·K

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.

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explanation:

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