Chemistry

Which of the following processes is exothermic?

a.rolling a ball up a hill

b.boiling water in a beaker to make steam

c.allowing meat to thaw after taking it out of the freezer

d.reacting hydrogen and oxygen gases to make water

e.a popsicle melting on a warm summer day

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  1. Energy going in is endothermic.
    Energy going out is exothermic.
    Use common sense. I'll be glad to check your answers BUT be sure and explain why you answered as you did.

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  2. i got d.

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  3. You're right. By the way, you've so many screen names it's difficult to follow. If you use the same screen name it helps us keep track AND you get answers a little faster. Don't worry that we will not answer for the same poster. That's not our criteria.

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