12 lonic or molecular solution ?
Electrosalinda, a Mexican chemist, wanted to
perform an experiment that allows her to know
whether a sodium sulfate solution lets the
electric current flow or not.
a- Name the material that she will need.
b- What is the expected result ?
C- Interpret this result.
what are the material that she will need?

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