1) A system loses 56.8 J of energy during a process. For each work process below
ID: 837499 • Letter: 1
Question
1) A system loses 56.8 J of energy during a process. For each work process below determine if the process exothermic, endothermic, or adiabatic?
endo,exo, or adiabatic?
it does 125.0 J of work
endo,exo, or adiabatic?
2) A sample of calcium carbonate is placed into a test tube, and a balloon is attached to the top of the test tube. If you heat up the calcium carbonate to generate the reaction:
CaCO3(s) --> CaO(s) + CO2(g)
...and the balloon expands, what are the signs for q and w, and is this reaction exothermic or endothermic?
endo or exo?
sign of w?
sign of q?
need help quick!
it has 25.0 J of work done on itExplanation / Answer
1 -
it is exothermic as heat change is -56.8 + 25 = -31.8 J
b - it is also exothermic as -56.8 - 125.8 = -182.6 J
2 - sign of q and W will be positive as according to latest sign convention work done on the process is positive and heat absorbed is positive
exothermic as change in enthalpy is positive
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