Did the food contain energy?
What kind of energy did it have to start with?
What kinds of energy was this released as?
Use different types of food to calculate which will give the most energy
A given amount of any substance always requires the same amount of energy to produce a particular increase in temperature.
1000g of water needs 4.2 kJ to make its temperature rise by 1 oC
Calculating the energy content of foods
The formula to calculate the energy release is
4.2 x M x T
Now calculate the energy content of your foods
M = mass of water (g)
T=rise in temperature ( °C)
A: Living Peas B: Dead Peas
Burn a lighted splint in each gas jar.
breathing and respiration
1 Which type of energy does food contain?
2 What is this energy converted to by other organisms? Give at least 3 examples.
3 What name is given to the process by which organisms release energy?
4 What kind of energy is always released in respiration?
The Chemistry of Respiration
energy and mitochondria clip
The energy released during respiration is not used directly by cells.
Instead it is used to make a molecule called ATP which stores the energy until it is needed.
ATP = Adenosine triphosphate