Be sure to answer all parts.

Calculate the standard free-energy changes for the following reactions at 25°C:

(a) H2(g) + Br2(l) → 2HBr(g)

kJ/mol

(b) 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(l)

kJ/mol

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Compare and contrast physical changes with chemical changes.

Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.