PLEASE HELP QUICKLY The diagram shows the potential energy changes for a reaction pathway. (10 points)

Part 1: Does the diagram illustrate an endothermic or an exothermic reaction? Give reasons in support of your answer.

Part 2: Describe how you can determine the total change in enthalpy and activation energy from the diagram and if each is positive or negative.

1. The reaction is an endothermic one because you can see that after the reaction occurs, the enthalpy is greater.

2. The total change in enthalpy is positive since it's endothermic, and you can calculate it by seeing the difference between A and C (C-A)

The activation energy can be found by subtracting the point of activation (the higher line) by the initial enthalpy. In this case it would look like B-A

Explanation:

i think it is d. e because the next one is igneous.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6