Exo and endothermic reactions
This sort of reaction releases heat
What is an exothermic reaction?
This sign of a chemical change can be measured using a thermometer
What is a temperature change?
These come before the arrow
What are reactants?
Plants perform this chemical reaction to produce sugars such as glucose
What is photosynthesis?
Increasing this will speed up reaction rate, a Bunsen burner could be used
What is temperature?
This type of reaction steals heat from the surrounding environment
What is an endothermic reaction?
This visual indication is a clear sign of chemical change, unless you've added dye
What is a change in a colour?
These come after the arrow
What are products?
Humans and many organisms perform this chemical reaction to turn sugar into usable energy
What is respiration?
This is one of the possible units for rate of reaction
What is g/s, mL/min etc. ?
The reaction between vinegar and bicarb soda is this sort of reaction
What is an endothermic reaction?
If a new one of these is formed, a chemical reaction has taken place
What is a substance?
The arrow represents this
What is a chemical reaction?
The chemical equations for respiration and photosynthesis have this relationship to each other
What is they are reversed?
Crushing a tablet will increase this, therefore reaction rate will increase
What is surface area?
The heat released in an exothermic reaction comes from this
What is breaking bonds?
Bubbles forming in a liquid indicate that this is happening. A sure sign of a chemical change
What is a gas being formed?
These numbers are placed in front of molecules
What are coefficients?
Some organisms including many fungi and bacteria perform this alternative to respiration, the results of which are often consumed by humans
What is fermentation?
Moles (M) are used to measure this, an important factor in reaction rate
What is concentration?
This is the energy needed to start a chemical reaction
What is activation energy?
This solid is formed when two solutes react to form an insoluble substance
What is a precipitate?
This number needs to go in front of the O2 and the H2O, in order to balance the following equation:
CH4 + O2 --> CO2 + H2O
What is 2?
Respiration uses the energy from sugars to produce this chemical, the energy currency of cells
What is Adenosine Triphosphate (ATP)?
This chemical speeds up a chemical reaction without being changed
What is a catalyst?