Which of the following is the best hypothesis? OA. Physical changes are much less interesting to watch than chemical changes. B. If sodium carbonate is added to vinegar, the reaction will absorb heat. C. Tearing a piece of paper is an example of a physical change. D. Some chemical reactions absorb heat, and others release heat. SUBMIT Help me y’all
B.) If sodium carbonate is added to vinegar, the reaction will absorb heat.
Explanation:
A.) is incorrect because this is not testable. Rather, it is just an opinion that cannot be proven correct or incorrect.
B.) is correct because this statement is testable. Tests need to be run to determine the accuracy of the statement.
C.) is incorrect because this statement explains something that does not need to be tested. It is an example of a physical change when one tears a piece of paper.
D.) is incorrect because this is already a true statement. It is obvious that not all reactions absorb/release heat. While tests could be run to further prove this statement true, it is already considered accurate.
The theory assumes that collisions between gas molecules and the walls of a container are perfectly elastic, gas particles do not have any volume, and there are no repulsive or attractive forces between molecules .
