sublimation of CO₂

boiling water

condensation of steam on cold glass

NaCl dissolving in water

ice melting

salt dissolving

water heating up

none of these

Building a skyscraper

A clean room becomes cluttered

An igloo melting

Osmosis (I hope you know your Biology!)

CaCO₃(s) → CaO(s) + CO₂(g)

2NO₂(g) → N₂O₄(g)

2NH₃(g) → 3H₂(g) + N₂(g)

C₆H₆(l) → C₆H₆(g)

a molecule is broken into two or more smaller molecules

a reaction occurs that results in an increase in the number of moles of gas

a solid changes to a liquid

all of these

a decrease in enthalpy

an increase in entropy

an increase in enthalpy

a decrease in entropy

AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

H₂O(g) + CO₂(g) → H₂CO₃(aq)

H₂(g) + I₂(g) → 2Hl(g)

C₂H₂O₂(g) → 2CO(g) + H₂(g)

lower enthalpy and less disorder

lower enthalpy and more disorder

higher enthalpy and less disorder

higher enthalpy and more disorder

1 mole of KNO₃(l)

1 mole of KNO₃(s)

1 mole of H₂O(l)

1 mole of H₂O(g)

ΔS = +ve and non spontaneous

ΔS = -ve and spontaneous

ΔS = -ve and non spontaneous

ΔS = +ve and spontaneous

slow process

fast process

process that needs an external intervention to occur

process that does not need external intervention to occur / keep happening

Exothermic

Endothermic

Could be either

Exothermic

Endothermic

Could be either

True

False

True

False