With detailed explanation of the formulas**

a 10.0-gram sample of h2o(l) at 23.0°c absorbs 209 joules of heat. what is the final temperature of the h2o(l) sample?

(1) 5.0°c
(2) 18.0°c
(3) 28.0°c
(4) 50.0°c

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Label a-f based on the table using c for concentrated and d for dilute

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?