CHEMISTRY GRADE 12

Which substance would likely have the greater entropy?

• Br_2(l)

• Br_2(g)

Which substance would likely have the greater entropy?

• SO_3(g)

• SO_2(g)

For the reaction: 2NH_3(g) --> N_2(g) + 3H_2(g)

• Entropy is increasing in the forward direction

• Entropy is decreasing in the forward direction

For the reaction: 4Fe_(s) + 3O_2(g) ---> 2Fe₂O_3(s)

• Entropy increases in the forward direction

• Entropy decreases in the forward direction

Choose the correct statement for the following reaction: CaCO_3(s) <---> CaO_(s) + CO_2(g)

• The forward reaction is endothermic because entropy increases toward the products

• The forward reaction is exothermic because entropy increases toward the products

• The forward reaction is endothermic because entropy decreases toward the products

• The forward reaction is exothermic because entropy decreases toward the products

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

Tags

NGSS.HS-PS1-2

What is the oxidation number of O in CO₂?

• +2
• -1
• +4
• -2

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

What is oxidation number of Mn in MnO₂ ?

• 0
• +2
• -2
• +4

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

What does Gibbs Free Energy tell us?

• How much energy is given off by a reaction.

• The tendency of a reaction to become "random"

• How spontaneous a reaction is.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

A spontaneous reaction is more profitable to a company.

• True

• False

Tags

NGSS.HS-PS1-4

NGSS.HS-ETS1-3