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Description
Flashcards by Melissa O'Mahony, updated more than 1 year ago
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Created by Melissa O'Mahony
over 7 years ago
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| Question | Answer |
| What type of reaction does the diagram show? | An exothermic reaction. |
| What type of reaction does the diagram show? | An endothermic reaction. |
| How do you convert from degrees celsius to Kelvin? | Add 273 to your value of degrees celsius. |
| Define: Endothermic Reaction | Endothermic Reaction: A reaction that takes in energy and cools the surroundings. |
| Define: Exothermic Reaction | Exothermic Reaction: A reaction that gives out energy and heats the surroundings. |
| Describe the enthalpy changes for an exothermic and an endothermic reaction. | The enthalpy change for an exothermic reaction is always negative. The enthalpy change for an endothermic reaction is always positive. |
| What are considered the 'standard conditions' of a reaction? | Temperature: 298K Pressure: 1atm Concentration: 1mol dm^-3 Standard States |
| Define the standard enthalpy change of a reaction. | Standard Enthalpy Change of a Reaction: The enthalpy changes when molar quantities of reactants as stated in the equation react together under standard conditions. |
| Define the standard enthalpy change of combustion. | Standard Enthalpy Change of Combustion: The enthalpy change that occurs when one mole of a substance is burnt completely in oxygen under standard conditions and in standard states. |
| Define the standard enthalpy change of formation. | Standard Enthalpy Change of Formation: The enthalpy change when one mole of a compound is formed from its elements under standard conditions in standard states. |
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