What is the final temperature when 20.0 g of water at 25°C is mixed with 30.0 g of water at 80°C?

In a heat of an engine, if 700 j enters the system, and the piston does 400 j of work what is the final internal (thermal) energy of the system if the initial energy is 1,500 j

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium. b)heavier than helium. c)the same weight as helium. d)dependent on the element that reacted with carbon.