The relative speed of decomposition under different conditions is described by which law?

• A. Caspar's Law
• B. Newton's Law
• C. Boyle's Law
• D. Hubble's Law

Answer: (A)

You're being tested on how the speed of a decomposition reaction depends on changing conditions. The rate isn’t fixed; it rises or falls as temperature, pressure, or catalysts alter how often and how energetically molecules collide and whether there’s an easier energy pathway to get the reaction going. Caspar's Law is described as the rule that links these conditions to the relative speeds of decomposition, so it fits the question by naming a principle that connects environment to rate. The other options describe laws governing motion, gas behavior, and cosmic expansion, not chemical reaction rates. In real chemistry, you’d quantify this sensitivity with something like the Arrhenius relationship, but for this question Caspar's Law is the best-matching description of how conditions affect the decomposition rate.