Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
|
State what is meant by the term activation energy (Ea) of a reaction. |
Minimum energy required for a reaction to start |
|
|
State in general terms how a catalyst increases the rate of a chemical reaction or how it works. |
A catalyst lowers the activation energy (Ea) by providing an alternative reaction route |
|
|
What does an increase in pressure do to a system in equilibrium? |
Favour the side with fewer moles |
|
|
Label the axes of a Maxwell-Boltzmann diagram |
Number of molecules x-axis _
Energy y-axis | |
|
|
What does the area under the curve of a Maxwell-Boltzmann distribution curve represent? |
The total number of molecules in the sample |
|
|
State why the curve starts at the origin in a Maxwell-Boltzmann distribution curve? |
No molecules have no energy Or All molecules have some energy |
|
|
Give the meaning of the term catalyst |
Speeds up the reaction rate Without being chemically used up |
|
|
At any time m, most of the molecules of X have energy less than the activation energy, suggest why, at a constant temp, most of X eventually decomposes. |
Molecules gain energy Due to collisions |
|
|
State how you could use the curve to find the rate of reaction at point X. |
Use gradient or Draw a tangent |
