A. How much carbon dioxide is produced when coal is burned? She 14.4 1. Differen

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A. How much carbon dioxide is produced when coal is burned? She 14.4 1. Different types of coal can be compared by the amount of CO, emitted per unit of energy output. This is typically expressed as weight (in pounds) of CO, emitted per million BTU(or 1,000,000 BTU) of heat energy produced The amount of CO2 gas emitted when coal is burned is related to the carbon content of the coal. Heat is produced when carbon and hydrogen are combined with oxygen during burning. In the previous section, you calculated the weight of coal (in pounds) that would need to be burned to produce 1 million BTU of energy She 14.4 Compare the weight of coal burned to the weight of CO, emitted, for each rank of coal. a. Which weighs more-the coal that was burned or the CO, that was produced? b. Propose a reason why the CO,gas emitted from the burning of coal weighs more than the coal that was burned: She 4.1 c. Which rank of coal has the highest CO2 emissions per million BTU? mea d. Which rank of coal has the lowest CO, emissions per million BTU? Carbon Content Weight of coal (in pounds) Weight of CO: (in pounds) emitted per 1 million BTU Coal Rank burned to produce 1 million BTU of energy of energy (for U.S. coal 120 to 181.8 b 76.9 to 120 lb 66 to 90.9 lb 64 to 74 lb 215.4 lb 214.3 Ib 205.7 lb 228.6 lb 46.60% fold Lignite Sub-bituminous coal | Bituminous coal 46-60% 46-86% 86-98% Anthracite coal When coal is burned, carbon atoms are moved from the geosphere to the atmosphere. Each atom of carbon in the coal combines with two atoms of oxygen to produce carbon dioxide (CO.). The atomic weight of carbon is 12, and the atomic weight of oxygen is 16. Adding two oxygen atoms (16+ 16) to each carbon atom (12) produces CO,(or 12+ 16+ 16 44). So carbon dioxide has an atomic weight of 44, which is approximately 3.667 times heavier than a carbon atom of atomic weight 12. Sho

Explanation / Answer

1).

a). Co2 that is producing as a result of combustion reaction weights more than the coal which was burned.

b). The amount of carbon dioxide (CO2) that is produced from burning a fuel weighs more than the amount of the fuel itself, because during complete combustion, each carbon atom in the fuel combines with two oxygen atoms in the air to make CO2. The addition of two oxygen atoms to each carbon atom forms CO2, which has an atomic weight of 44—roughly 3.6667 times the atomic weight of the carbon, which is 12.

c). Anthracite coal has highest co2 emmission per million btu.

d). Bituminous coal  has lowest co2 emmission per million btu.

2).

2012 production of coal in USA = 1016.4 million short tonnes

1short ton = 2000 lb

total coal produced = 1016.4 * 2000 = 2032800 lb

assume coal produce is of Bituminous coal rank and 80 lb when burned then produce 1million btu of energy ( from table)

1 lb of coal = (1/80) million btu of energy

2032800 lb of coal = 2032800 * (1/80)btu of energy = 25410 MILLION BTU ENERGY PRODUCED

3). Effects of co2 in the atmosphere are-

1- GREENHOUSE EFFECT

2- ACID RAIN

3- GLOBAL WARMING

4-CLIMATE CHANGE

5- HUMAN HEALTH IMPACTS

6- EFFECTS ON PLANTS

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