The combustion of magnesium creates so much energy so quickly that it is hard to measure its enthalpy directly using a simple calorimeter. however, you will break this reaction down into other intermediate reactions whose enthalpies you can – and will – measure. what broad question are you answering by doing this experiment?

How can you use Hess’s law to determine a reaction’s enthalpy?

Which of the following describe your question? :

It was about Hess’s law.

It was about computing enthalpy.

It was a general question not specifically about magnesium combustion.

It was an open-ended question, which can not be answered “yes” or “no.”

Answer on edg

"How can you use Hess’s law to determine a reaction’s enthalpy?"

It was about Hess’s law.

It was about computing enthalpy.

It was a general question not specifically about magnesium combustion.

It was an open-ended question, which can not be answered “yes” or “no.”

one state would change   like louisiana to texas. thats a change

explanation:

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.