Regents Chemistry Exam August 2025 Question 23 23  Naturally occurring chemical systems tend to undergo changes toward (1) lower energy and lower disorder (2) lower energy and greater disorder (3) higher energy and lower disorder (4) higher energy and greater disorder Solution: In nature, chemical systems tend to undergo changes towards lower energy (more stable) and higher disorder. Choice 2 is the correct answer. LINKS: Regents Chemistry Guides and Solutions Chemistry Tutor

Regents Chemistry Exam August 2025 Question 21 22  When a catalyst is added to a chemical reaction it produces (1) a greater heat of reaction (2) a greater activation energy for the reactants (3) an alternate reaction pathway (4) an alternate potential energy for the products Solution: A catalyst speeds up the reaction by lowering its activation energy and providing an alternate reaction pathway. Choice 3 is the correct answer. LINKS: Regents Chemistry Guides and Solutions Ch