Which of the following reactions represents an exothermic reaction? C 2S → CS 2, ΔH = 27,550 cal 2H 2O → 2H 2 O 2, ΔH = 58 kcal C (graphite) → C (diamond), ΔH = 0. 45 kcal NH 3(g) 12. 0 kcal → ½N 2(g) 3/2H 2(g) CH 4 2O 2 → CO 2 2H 2O 212,800 cal.

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

Match each statement with the state of matter it describes