6. A 4.0 L sample of methane gas is collected at 30.0 °C. Predict the volume of the sample at 0.0 °C.
Write out the answer

V₂ = 3.6 L

Explanation:

Given data:

Initial volume = 4.0 L

Initial temperature = 30.0°C

Final volume = ?

Final temperature = 0.0°C

Solution:

Initial temperature = 30.0°C (30+273=  303 K)

Final temperature = 0.0°C (0+273=  273 K)

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 4.0 L × 273 K / 303 k

V₂ = 1092 L.K / 303 K

V₂ = 3.6 L

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

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.