Respiration in the cells is C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy.
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Respiration in the cells is .
- Is it exothermic or endothermic?
- Check that the equation is balanced.
- What mass of carbon dioxide do we breathe out when of glucose is used? Use glucose and .
Need a reminder? The key ideaShow
An exothermic change gives out heat, so the surroundings warm up. An endothermic change takes heat in, so they cool. Heat taken by water: , with .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Exothermic: it gives out the energy that we use.
Step 2. (b) C: . H: . O: on the left, on the right.
Step 3. (c) of glucose gives of : .
Answer: (c) .
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