Which statement best explains the value of the Periodic Table

Chemistry

2 answers:

White raven [17]3 years ago

5 0

Provides a view of the elements organized by their properties

Readme [11.4K]3 years ago

4 0

Answer: Option (1) is the correct answer.

Explanation:

A periodic table is a chart in which all the elements are placed in rows and columns according to their increasing atomic number from left to right side.

In a periodic table there are 18 columns and 7 rows.

All these elements are organized in such a way that elements which are present in same group show similar chemical properties.

Thus, we can conclude that the statement it provides a view of the elements organized by their properties best explains the value of the Periodic Table.

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Consider the following reaction at constant pressure. Use the information provided below to determine the value of ΔS at 473 K.

Elis [28]

Answer:

The reaction will be spontaneous

Explanation:

To determine if the reaction will be spontaneous or not at this temperature, we need to calculate the Gibbs's energy using the following formula:

$\Delta G= \Delta H - T * \Delta S$

If the Gibbs's energy is negative, the reaction will be spontaneous, but if it's positive it will not.

Calculating the $\Delta G= -1267 - 473 K* \Delta S$ :

$\Delta G= -1267 - 473 K* \Delta S$

Now, other factor we need to determine is the sign of the S variation. When talking about gases, the more moles you have in your system the more enthropic it is.

In this reaction you go from 7 moles to 8 moles of gas, so you can say that you are going from one enthropy to another higher than the first one. This results in: $\Delta S>0[/tex}Back to this expression: [tex]\Delta G= -1267 - 473 K* \Delta S$