Standard Enthalpy Change

What is the standard temperature used in standard conditions?

• 0 degrees Celsius

• 100 degrees Celsius

• 25 degrees Celsius

• 50 degrees Celsius

Mention the other three standard conditions.

What is the enthalpy change of combustion defined as?

• The change when one mole of a substance reacts with water

• The change when one mole of a substance reacts with oxygen

• The change when one mole of a substance is formed from its elements

• The change when a reaction takes place in any quantity

What is the value of the standard enthalpy change of neutralization?

• 100 kilojoules per mole

• Minus 57 kilojoules per mole

• 57 kilojoules per mole

• 0 kilojoules per mole

How many moles of hydrogen are needed to form one mole of butane?

• 5 moles

• 2 moles

• 3 moles

• 4 moles

What does the standard enthalpy change of reaction refer to?

• The change when a reaction occurs in specified molar quantities

• The change when a substance reacts with oxygen

• The change when one mole of water is formed

• The change when one mole of a compound is formed