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:
Why does the author include the story of Kristina Cockle and her research in Argentina? Cockle's research focused on trees with cavities in different environments (e.g., forests vs. suburbs). This is another example of modern research on tree cavities and helps scientists figure out how to protect them.
Answer:
(A) fancy lettering, visual art
Explanation:
Your answer is A.
Answer:
Nature versus nurture debate
Explanation:
I think that nurture and nature go along with the description in your question because the way you’re raised and the environment you’re surrounded by are two very contradicting topics.
Answer:
The policy of segregation will increase a sense that they are lower/inferior because it is law. The racially segregated school limit the benefits from African American children. Due to segregation, many African American children feel lower than the rest of their classmates. According to the passage by Justine Warren, by approving the concept of racial segregation in schools will increase black people's feeling of inferiority because it is said in the law that they are. Because of that, many black children will lose the desire to learn and they will also have the feeling that they are worthless and unimportant.
Explanation:
