Why does enzyme activity increase with temperature?
Higher temperature increases kinetic energy and collision frequency
Why does enzyme activity decrease above optimum temperature?
Enzyme denatures and active site changes shape
How does extreme pH affect enzymes?
Causes denaturation and reduces enzyme activity
What causes diffusion?
Movement of particles down a concentration gradient
Why does diffusion slow over time?
Concentration gradient decreases
What is electric current?
Rate of flow of charge
What is voltage?
Energy transferred per unit charge
What is resistance?
Opposition to current
State the relationship between V I and R
V = IR
What is complete combustion?
Fuel burns fully with sufficient oxygen
What is incomplete combustion?
Fuel burns with limited oxygen producing CO or soot
Why does incomplete combustion release less energy?
Fuel does not fully oxidise
Why may soot form in fuel experiments?
Incomplete combustion due to limited oxygen
Why is less energy transferred in fuel experiments?
Heat loss and incomplete combustion
