During the production of electricity in a coal-fired power station, energy is present in the following forms - VCE - SSCE Chemistry - Question 20 - 2007 - Paper 1
Question 20
During the production of electricity in a coal-fired power station, energy is present in the following forms.
I mechanical energy of turbine
II chemical energy o... show full transcript
Worked Solution & Example Answer:During the production of electricity in a coal-fired power station, energy is present in the following forms - VCE - SSCE Chemistry - Question 20 - 2007 - Paper 1
Step 1
II chemical energy of coal and oxygen
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The chemical energy stored in coal and oxygen is the first form of energy involved in electricity generation. This energy is released during combustion, but it is considered lower in the energy conversion hierarchy.
Step 2
III thermal energy of steam
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Next, the thermal energy of steam is produced from the combustion process. This energy is crucial for driving turbines and producing mechanical energy, making it higher than the chemical energy but lower than mechanical energy.
Step 3
I mechanical energy of turbine
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Finally, the mechanical energy of the turbine represents the highest form of energy in this context. It is the result of converting thermal energy into mechanical form, driving the generator to produce electricity.
