Oquizy

What does this graph show about catalyst?

Catalysts increase activation energy Catalysts make reactions slower Catalysts provides a more efficient reaction pathway Catalysts reduce activation energy needed

From the graph, which is true if volume is the same?

X used more concentrated acid X was done at a lower temperature Y is more reactive Y used a catalyst

Xinyi is testing rate of reaction for an unknow solid. She uses sample A (powdered solid) and sample B (same mass, large lumps) and obtains this graph.
What does the disappearing cross indicate?

Sulfur is forming and blocking the view The pH is increasing The rate of gas production The reaction has ended completely

What is the relationship?

Particle size has no effect Powdered CaCO₃ reacts slower Rate increases as surface area increases Surface area decreases rate

What does this show?

Activation energy remains unchanged Catalyst adds energy to curve Catalyst removes energy from particles More particles exceed activation energy when catalyst is used

This is the energy graph for Haber Process. Iron catalyst is used. Which statement is true?

Catalyst affects equilibrium position Catalyst reduces activation energy Catalyst speeds up both forward and backward reactions Iron catalyst lowers yield in Haber process

Quiz: Chemistry - Rate Of Reactions