ehicles. The ordinate is mg CO, per mile driven per pound mass of the vehicle (called curb weight). For electric vehicles, CO, emission varies in U.S. states because of the mix of fuels used to generate electricity. If electricity came entirely from olar power, there would be little CO, associated with its production. California has the lowest CO, emission for producing lectricity and Ohio has the highest because it depends heavily on coal-fired power plants. Gasoline |109 Diesel | 91 Hybrid | 72 U.S. average 50 | Fossil fuel vehicles | Electric vehicles California 20 Техas 53 New York |22 Ohio |76 20 40 60 80 100 120 mg CO, per mile per pound curb weight Average CO, emissions for different vehicle types. [Data from D. J. Berger and A. D. Jorgensen, “A Comparison of Carbon Dioxide Emissions from Electric Vehicles to Emissions from Internal Combustion Vehicles," J. Chem. Ed. 2015, 92, 1204.] he chart does not include CO, emission from manufacturing vehicles. When normalized for distance driven by each kind of ehicle before it is scrapped, CO, emission associated with manufacturing electric vehicles is estimated to be 25–75% greater
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.
The chart shows average CO2 emissions for fossil fuel vehicles (gasoline, diesel, and hybrid gas‑electric), as well as electric vehicles. The ordinate is mg CO2 per mile driven per pound mass of the vehicle (called curb weight). For electric vehicles, CO2 emission varies in U.S. states because of the mix of fuels used to generate electricity. If electricity came entirely from solar power, there would be little CO2 associated with its production. California has the lowest CO2 emission for producing electricity and Ohio has the highest because it depends heavily on coal‑fired power plants. The chart does not include CO2 emission from manufacturing vehicles. When normalized for distance driven by each kind of vehicle before it is scrapped, CO2 emission associated with manufacturing electric vehicles is estimated to be 25–75% greater than CO2 emission associated with manufacturing gasoline and diesel vehicles. If manufacturing were included, CO2 emission associated with electric vehicles driven in Ohio would be about equal to that of gasoline vehicles.
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