Answer:
The sign of H is positive, and the products have more potential energy than the reactants.
Explanation:
The options you were given are the following:
- The sign of H is positive, and the products have less potential energy than the reactants.
- The sign of H is positive, and the products have more potential energy than the reactants.
- The sign of H is negative, and the products have less potential energy than the reactants.
- The sign of H is negative, and the products have more potential energy than the reactants.
An endothermic reaction is a chemical reaction that absorbs heat from the surroundings. The absorbed energy provides the activation energy for the reaction to occur.
The sign of H refers to the change in enthalpy. Enthalpy is the thermodynamic property of a system. It is the sum of the internal energy added to the product of the pressure and volume of the system:
If the pressure and volume are constant, the change in enthalpy equals the transferred heat (q). If <em>q</em> is positive, we have an endothermic reaction. The change in enthalpy (the sign of H) in that case always positive, as the change in internal energy is positive (heat is absorbed).
Answer:
#1
Explanation:
It makes the biggest impact on the reader. When writing a article about something as important as this generally what an author will do to captivate the attention of the audience is to make it clear exactly how dire the situation is. It important to make sure that the reader knows that this topic is important. So I would say that ending the first paragraph with something as impactful as #1 would be the best choice, as you really want to draw your reader in and make them acknowledge the topic, it will give the reader a sense of urgency to understand what is going on.
I hope that helped, but incase you didn't understand a word of that;
Basically you want to make sure that the reader of this essay is dead set on learning what is going on with the butterflies, so you want to highlight that there is something BIG going on and #1 really helps to be like "hey there's a problem here!"
Answer:
Education is a means of achieving a world of peace, justice, freedom, and equality for all. Thus, education is extremely necessary for all. No good life is possible without education. It indorses the intelligence of human beings, develops his skill, and enables him to be industrious.
