Which process involves an increase in entropy? crystallization of a solute from a solution ice melting into liquid water iodine vapor forming solid iodine condensing a gas into a liquid?

Answer : The correct option is, ice melting into liquid water.

Explanation :

Entropy : It measures the disorderedness or randomness of the atoms in the system. Or, it measures the number of possible arrangements of the atoms or molecules in the system.

As we going from solid state to liquid state to gaseous state, the entropy of increases. And as we going from gaseous state to liquid state to solid state, the entropy decreases.

Crystallization of a solute from a solution : In this process the phase changes from liquid to solid state. So, the entropy decreases.

Ice melting into liquid water : In this process the phase changes from solid to liquid state. So, the entropy increases.

Iodine vapor forming solid iodine : In this process the phase changes from gas to solid state. So, the entropy decreases.

Condensing a gas into a liquid : In this process the phase changes from gas to liquid state. So, the entropy decreases.

Hence, the correct option is, ice melting into liquid water.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2