ENTHALPY

Which enthalpies has standard enthalpy of formation=0 kJmol^-1?

• standard enthalpy of formation HCl

• standard enthalpy of formation oxygen gas

• standard enthalpy of formation CO₂

• standard enthalpy of formation C₂H₆

The above equation represent an equation for enthalpy of ________.

• atomization

• sublimation

• combustion

• formation

The above equation represent an enthalpy of_______ for silicone oxide.

• combustion

• atomisation

• neutralisation

• formation

The standard enthalpy of combustion carbon is -393 kJmol^-1. What is the standard enthalpy of formation carbon dioxide, CO₂?

• -393 kJmol^-1

• +393 kJmol^-1

• -196.5 kJmol^-1

• -786 kJmol^-1

Standard enthalpy of combustion hydrogen gas is -285 kJmol^-1. How much energy released if 0.5 mol hydrogen gas combusted?

• -285 kJ

• -142.5 kJ

• -570 kJ

• +285 kJ

Which equation represent enthalpy of atomisation chlorine?

• A

• B

• C

• D