Chemistry quiz 100%

Two samples of carbon come And to contact a heat transfer will occur between sample a and sample b what must be true for heat transfer from sample a sample b

A. The average kinetic energy of a is greater than that of B

And what type of reaction or process does heat flow into the system

D. Endothermic

Iron reacts with oxygen any chemical hand warmer how should this reaction be categorized? A. As an exothermic process because it releases heat B. As an endothermic process because it releases heat C. As an exothermic process because it absorbs heat D. As an endothermic process because it absorbs heat

A

Which answer to find exothermic reaction

A. A process in which energy is released as heat

Which statement about exothermic reactions is accurate

A. As reactants form products that potential energy decreases

How does a potential energy diagram for a reaction indicate whether the reaction is endothermic or exothermic

A. In endothermic reaction has reactants that are lower in energy than products because energy is absorbed to form the products

Heat that flows by conduction is the transfer or thermal energy between substances in contact which must occur for this to happen

C. One system must have higher kinetic energy than the other system

The temperature of a gases increase which statement best explains effect that this On the motion of gas particles

D. The average kinetic energy increases in the particles collide more frequently

An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation?

d. Heat flows from the counter to the ice causing the molecules in the counter to move more slowly

Which event is endothermic

d. the melting of ice