A sample of calcium carbonate is placed into a test tube, and a balloon is attac

Question

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?

exothermic or endothermic? Answer 1 Choose...exothermic, positive (+), endothermic, adiabatic, negative (-) sign of q Answer 2 Choose...exothermic, positive (+), endothermic, adiabatic, negative (-) sign of w Answer 3 Choose...exothermic, positive (+), endothermic, adiabatic, negative (-)

Explanation / Answer

endothermic

sign of q= positive

sign of w= positive

. H = H of products H of reactants H ((634.9 kJ/mol) (393.5 kJ/mol)) (1206.9 kJ/mol) 178.5 kJ/mol endothermic Con

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