Which phase change results in a release of energy

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

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

What is the mass of 0.46 mol of mgcl2