ENERGETICS FORM 4

Exothermic reactions are ones that.....

• Release energy to the surroundings

• Absorb energy from the surroundings

• Remain at a constant temperature

• Decrease in temperature

endothermic reactions ........

• have more energy in their products

• have less energy in their products

• have more energy in their reactants

• have the same amount of energy in reactants and products

A minus figure in an enthalpy change is....

• a mistake

• sometimes caused by the wrong reactants

• no significance

• tells you it is an exothermic reaction

Formula of heat change, Q

• Q = mcΔT
• Q = mΔT

activation energy

• minimum energy required for a reaction to occur
• energy cycle

Which letter corresponds to the energy of the products?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

What kind of reaction is this?

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

Is Evaporation endo or exothermic?

• endothermic
• exothermic

Tags

NGSS.MS-PS1-4

Is Freezing endothermic or exothermic?

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4