Aflask of fixed volume contains 1.0 mole of gaseous carbon dioxide and 88 g of solid carbon dioxide. the original pressure and temperature in the flask is 1.0 atm and 300. k. all of the solid carbon dioxide sublimes. the final pressure in the flask is 2.5 atm. what is the final temperature? assume the solid carbon dioxide takes up negligible volume. a. 150 kb. 200 kc. 250 kd. 300 ke. 400 k

The final temperature of the flask: T₂= 250 K

Explanation:

Given: Volume of gas: V = constant, mass of CO₂: w = 88 g

Initial pressure of gas: P₁ = 1 atm, Initial temperature: T₁ = 300 K, Initial number of moles of gas: n₁ = 1 mole

After sublimation- Final pressure of gas: P₂= 2.5 atm, Final temperature: T₂=?K

Molar mass of CO₂: m = 44 g/mol, given mass of CO₂: w = 88 g

Therefore, the final number of moles of CO₂ gas after sublimation of 88 g solid CO₂: n₂ = initial number of moles + number of moles sublimed

∴ n₂ = n₁ + (w ÷ m) = 1 mole + (88 g ÷ 44 g/mol) = 1 mole + 2 mole

→ n₂ = 3 moles

To find the final temperature of CO₂ gas, we use the Gay-Lussac's law:

→

→

→

Therefore, the final temperature of the flask: T₂= 250 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.