How much heat will be absorbed when 13.7 g of nitrogen reacts with excess O2 according to the following equation? Circle one: Is this reaction endothermic or exothermic? Additionally, rewrite the thermochemical equation in the other format. N 2 + O2 → 2NO ∆H = +180 kJ What mass of propane, C3 H 8 , must be burned in order to produce 76,000 kJ of energy? Circle one: Is this reaction endothermic or exothermic? Additionally, rewrite the thermochemical equation in the other format. C 3 H 8 + 5O2 → 3CO2 + 4H 2 O + 2200 kJ How much heat will be transferred when 14.9 g of ammonia reacts with excess oxygen according to the following equation? Circle one: Is this reaction endothermic or exothermic? Additionally, rewrite the thermochemical equation in the other format. 4NH 3 + 5O2 → 4NO + 6H 2 O ∆H = -1170 kJ
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.
How much heat will be absorbed when 13.7 g of nitrogen reacts with excess O2 according to the
following equation?
Circle one: Is this reaction endothermic or exothermic?
Additionally, rewrite the thermochemical equation in the other format.
N 2 + O2 → 2NO ∆H = +180 kJ
Circle one: Is this reaction endothermic or exothermic?
Additionally, rewrite the thermochemical equation in the other format.
C 3 H 8 + 5O2 → 3CO2 + 4H 2 O + 2200 kJ
to the following equation?
Circle one: Is this reaction endothermic or exothermic?
Additionally, rewrite the thermochemical equation in the other format.
4NH 3 + 5O2 → 4NO + 6H 2 O ∆H = -1170 kJ
10. How much heat will be absorbed when 38.2 g of bromine reacts with excess hydrogen according
to the following equation?
Circle one: Is this reaction endothermic or exothermic?
Additionally, rewrite the thermochemical equation in the other format.
H 2 + Br 2 + 72.80 kJ → 2HBr
All in In stoich format!!!
Thank you so much!
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