Answer to Question #318982 in General Chemistry for Chuchutvvvvvv

Question

5. Zero is the equivalent standard enthalpy formation of;

a. more stable allotropes c. less stable allotropes

b. the reactant of greater concentration d. the reactant of less concentration

6. Which of the following has a standard heat of formation that is NOT equal to zero,

a. Na b. CO2 c. Fe d. Br2

7. Which of the following is NOT TRUE about Hess’s Law?

a. If an equation is reversed the sign of the ∆𝐻 is retained.

b. It is used to find heat changes in either physical or chemical changes

c. It makes possible to measure a heat of reaction without actually doing the experiment

d. It says that if you add two or more thermochemical equations to give a final equation, you

can also add the heats of reaction to give the final heat of reaction.

Answer 1

A

B

A