NCEA Level 2 Thermochemistry

Refer the the following question:

2N₂ + 3H₂ --> 2NH₃ :ΔH = - 46 kJ

How much energy would be produced if only 1 mol of nitrogen was reacted?

• 92 kJ

• 0.143 kJ

• 23 kJ

• 15 kJ

Do reactants in an endothermic reaction have a higher or lower energy than the products? 

• Higher
• Lower

Tags

NGSS.HS-PS1-4

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

• Warm

• Cold

• Bubbly

• Damp

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

In an exothermic process, the surrounding loose heat. True or False?

• True

• False

Is the combustion of petrol endothermic or exothermic?

• Endothermic

• Exothermic

Which of the following is an endothermic process?

• gas to solid

• liquid to solid

• solid to liquid

• gas to liquid

Is this reaction exothermic or endothermic?

• endothermic

• exothermic

Which of the letters (A-D) represents activation energy?

• A
• B
• C
• D

Tags

NGSS.HS-PS3-1

What is the minimum amount of energy needed to start a reaction is called?

• surface energy

• activation energy

• concentration

• catalyst

The amount of energy that is absorbed or lost by a system during a process is called the

• a) enthalpy change

• b) entropy change

• c) specific heat capacity

• d) energy difference