Some of the methods used for the determination of rate of reaction are called physical methods because:
Correct answer: D. They monitor some physical property
- A. They involve a simple chemical reaction
- B. They produce mass change
- C. They lower Ea physically
- D. They monitor some physical property
Explanation
Physical methods involve measuring or monitoring physical properties like temperature, pressure, volume, conductivity, color changes, etc. This is why they are termed as "physical methods". They provide indirect information about the progress of a chemical reaction.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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