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I color change
Il production of gas
III temperature change
IV precipitate
I and II
19.
I, II, III, IV
A student mixes two clear solutions. Which of the above is evidence that a chemical
reaction is occurring?
O
II and III
II, III, and IV
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In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added