Quantative Chemistry Flashcards
What happens to the energy in exothermic reactions?
They transfer energy from the reacting molecules to the surroundings making the temperature of the surroundings increase
What are examples of exothermic reactions?
Combustion, oxidation reactions and neutralisation
What happens to the energy in endothermic reactions?
They take in energy from the surroundings making the temperature decrease
What’s an example of an endothermic reaction?
Thermal decomposition, ice melting
What does the peak in the energy profile diagram represent?
Activation energy
What is activation energy?
The minimum amount of energy that particles must have in order to react is called the activation energy
Which are negative and which are positive in bonds?
Bonds breaking is positive (exothermic) bond making is negative (endothermic)
What is an electrolyte?
A solution that can conduct electricity for example a solution for an ionic compound
What effects the energy flow?
The length of the wire, the thickness of the wire and the temperature
What affects the potential difference?
The greater the reactivity difference of the metals and the electrolyte
