KE L74

high randomness indicates _________.

• low entropy

• high entropy

Tags

NGSS.HS-PS3-4

dissolving sugar ________-.

• decreases the entropy

• increases the entropy

which of the following increases the entropy of a system ?

• increasing the temperature

• decreasing the temperature

• decreasing the pressure

Solid magnesium dissolves in a hydrochloric acid, releasing hydrogen gas and heat from a solution of magnesium chloride. What is the sign on ΔH for this reaction?

• Negative because it is exothermic
• Negative because it is endothermic
• Positive because it is exothermic
• Positive because it is endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Which one of these would result in a decrease in entropy?

• A solid solute dissolves in water.
• A gas is released.
• A liquid freezes.
• A liquid boils.

An increase in  numbers of moles from reactants to products (e.g. 3A  --> 4 B) would cause a decrease in entropy.

• True
• False

For the following reaction indicate if entropy is increased or decreased.     2 Li(s) + 2  H₂O(l)  ---->2 LiOH(s)  +  H₂(g)  +  213.0 kJ (Kilojoules)

• increase
• decrease

For the following reaction indicate if entropy is increased or decreased.    2N₂(g)  +  3 H₂(g)  ------->  2 NH₃(g)

• increase
• decrease

Systems in nature tend to undergo changes toward

• lower energy and less disorder

• lower energy and more disorder

• higher energy and less disorder

• higher energy and more disorder

Tags

NGSS.HS-PS3-4

Identify whether the following result in an increase or decrease in entropy:

SUBLIMATION

• increase

• decrease