How does heat engine convert thermal and chemical energy to mechanical energy?

How does heat engine convert thermal and chemical energy to mechanical energy? Correct Answer By bringing a working substance from a higher state temperature to a lower state temperature

The heat engine convert thermal and chemical energy to mechanical energy. It does this by bringing a working substance from a higher state temperature to a lower state temperature. During this conversion, any form of energy being used is not converted to electrical energy.
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Related Questions

A Carnot heat engine receives heat at 750 K and rejects the waste heat to the environment at 300 K. The net work output of the heat engine is used to drive a Carnot refrigerator, whose COP is 6.14. If the heat removal rate from the refrigerated space is 6.6 kW, determine the rate of heat supply to the heat engine?
Which one of the statement is correct?
1. Petrol engine is a reciprocating engine
2. Petrol engine is high speed engine
3. Petrol engine uses petrol as fuel
4. Petrol engine is internal combustion engine
Some pairs of devices and associated energy changes are given below.
1. Electric generator ⟺ Mechanical to electrical
2. Electric motor ⟺ Electrical to mechanical
3. Diesel engine ⟺ Light to electrical
4. Solar cell ⟺ Chemical to mechanical
Which of the above pair/s is/are correctly matched?
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The mechanical energy can be completely converted into heat energy but the whole of the heat energy cannot be converted into mechanical energy.
Heat is transferred to a heat engine from a furnace at a rate of 80 MW. If the rate of waste heat rejection to a nearby river is 50 MW, determine the thermal efficiency for this heat engine.
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow and k = Thermal conductivity of the body)
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Which engine is designed to convert chemical energy of heavier fuel oil into mechanical energy?