4) Standard Enthalpy Changes
4) Standard Enthalpy Changes
- Created by: Hannah
- Created on: 19-02-13 11:10
Other questions in this quiz
2. Define the standard enthalpy change of combustion (ΔHcѲ)
- the enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard states
- the enthalpy change that takes place when one mole of a substance reacts completely with nitrogen under standard conditions, all reactants and products being in their standard states
- the enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products not being in their standard states
3. What is a standard state?
- the state in which a substance was discovered
- the physical state of a substance under standard conditions
- the physical state of a substance which it is normally found in
4. Define the standard enthalpy change of formation (ΔHfѲ)
- the enthalpy change which takes place when one mole of a compound is formed from its constituent elements in their standard states under standard conditions
- the enthalpy change which takes place when two moles of a compound is formed from its constituent elements in their standard states under standard conditions
- the enthalpy change which takes place when one mole of a compound is formed from its constituent elements not in their standard states under standard conditions
5. What is not a standard condition?
- a stated temperature
- a pressure of 200kPa
- a pressure of 100kPa
- a concentration of 1moldm-3
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