Exothermic and endothermic reaction

What do exothermic reactions involve

Exothermic reactions involve a transfer of energy from the reactants to the surroundings

What is transferred and what will it show in an exothermic reaction

energy is transferred to the surroundings this will show an increase in temperature

What is an example of an exothermic reaction

Examples of exothermic reactions include combustion, freezing and condensing

What do endothermic reactions involve

Endothermic reactions involve a transfer of energy from the surroundings to the reactants

What is taken in in an endothermic reaction and what will it show

energy is taken into the reactants a decrease in temperature will be shown

What is an example of an endothermic reaction

Examples of an endothermic reactions include thermal decomposition, melting and boiling

What do energy level diagrams show

Energy level diagrams show the values of energy between the reactants and the products in a reaction

What does it mean if there is more energy in the reactants than the products

If the energy is greater in the reactants than the products then the reaction is exothermic and energy has been given out to the surroundings

What happens if the energy is lower in the reactants than the products

If the energy is lower in the reactants then the reaction is endothermic as energy has been taken in from the surroundings,

An ice cube melts as energy is transferred from the drink it is in to an ice cube. Why is melting endothermic?

In ice, forces of attraction hold water molecules in a pattern. When energy is transferred to the ice, these forces are disrupted. The water molecules move out of their arrangement, and the ice melts

What happens on energy level diagrams for changes of state and what does each diagram show about change of state

Both diagrams show that liquid water stores more energy than the same amount of ice. The first diagram shows that ice takes energy from the surroundings as it melts. The second shows that water gives out energy to the surroundings as it freezes.

Is freezing exothermic

Freezing is exothermic