When a system , ΔE is always negative. A) absorbs heat and does work
B) gives off heat and has work done on it
C) absorbs heat and has work done on it
D) gives off heat and does work
E) None of the above is always negative.

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.