Ca(OH)2 (aq) + H₂SO4 (aq) →+ 2 H₂O (1) + CaSO4 (aq) (This is LIMITING REACTANT: H.SO, is the Limiting Reactant) Reaction Type: Neutralization Grams of Product (List the Product and the Amount): 0.180 g H₂O and 0.681 g CaSO4 ? g H₂0 = 1.839 g Ca(OH)2 x 1 mol Ca(OH)2 x 74.10 g Ca(OH)2 ? g H₂O 25.0 mL H₂SO4 x = Ca (OH)₂ amount = 1.839 g GIVEN 1.469 g ONLY USE THE Limiting Reactant TO DETERMINE THE AMOUNT OF THE REMAINING PRODUCT(S). ? g H₂O = 25.0 mL H₂SO4 x IL H₂SO4 x 0.200 mol H₂SO4 x 1 mol CaSO4 x 136.14 g CaSO4 1000 mL H₂SO4 1L H₂SO4 1 mol H₂SO4 1 mol CaSO4 ? g Ca (OH)₂ USED = 25.0 mLH₂ SO4 X- = 0.3705 g Ca (OH)₂ Amount of Ca(OH)2 remaining in the container = -- 1L H₂SO4 x 0.200 mol H₂SO4 x 2 mol H₂O x 18.02 g H₂O = 0.180 g H₂0 1000 mL H₂SO4 1L H₂SO4 1 mol H₂SO4 1 mol H₂O 2 mol H₂O x 18.02 g H₂O = 1 mol Ca(OH)2 1 mol H₂O 1 LH₂ SO4 1000 mL H₂ SOA X LEFT 0.8944 g H₂O given - Ca (OH)2 amount used 0.3705 g USED OVER = EXCESS 0.200 mol H₂ SO4 1 mol Ca (OH)2 1 LH₂ SOA 1 mol H₂ SO₂ X X 0.681 g CaSO4 74.093 g 1 mol Ca (OH)₂ 1 mol Ca (OH)₂
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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