I.Learning Tasks Instructions: Define the following terms using your own words in one sentence only.

A.Thermochemistry: _______________________________________________________________________________

B.Thermodynamics:

_______________________________________________________________________________

C.Law of Conservation of Energy:

_______________________________________________________________________________

D.Open System:

_______________________________________________________________________________

E.Entalphy:

_______________________________________________________________________________

II.Learning Tasks Instructions: Identify whether the following processes are endothermic or exothermic.

A.N2 + 3H2 2NH3 + HEAT

B.C₆H₁₂O₆ + 6O₂ 6CO₂ + 6H₂O + ENRGY

C.6CO₂ + 6H₂O C₆H₁₂O₆ + 6O₂ -HEAT

D.CaO_(s) + H₂O _(l) Ca(OH)_2(aq) + HEAT

E.N2(g) + O2 (g) 2NO (g) - HEAT

III.Learning Tasks Instructions: Calculate the change in energy for the following processes. Identify if it is endothermic or exothermic.

A.How much work was done when 46 kJ of energy was spent on compressing gas as it released 28 kJ of heat?

B.How much heat is released by a system when 45 J of work is done on it to decrease its energy to 23 J?