What is the working substance in an external | vedclass

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(B) In an external combustion engine,the fuel is burned outside the engine cylinder. The heat generated is used to convert water into high-pressure st

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Steam in external combustion engine and air-fuel mixture in internal combustion engine

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(B) In an external combustion engine,the fuel is burned outside the engine cylinder. The heat generated is used to convert water into high-pressure steam,which then acts as the working substance to perform mechanical work. Examples include steam engines and steam turbines.In an internal combustion engine,the fuel is burned inside the engine cylinder itself. The combustion of the fuel creates high-pressure gases (a mixture of air and fuel),which expand to push the piston,acting as the working substance. Examples include petrol and diesel engines.

Column-$I$	Column-$II$
$(a)$ Adiabatic	$(i)$ $\Delta Q = \Delta U$
$(b)$ Isothermal	$(ii)$ $\Delta Q = \Delta W$
	$(iii)$ $\Delta U = -\Delta W$

What is the working substance in an external combustion engine and an internal combustion engine?

Similar Questions

Obtain the relation between the coefficient of performance and the efficiency of a heat engine.

An ideal gas expands isothermally from volume $V_1$ to volume $V_2$. It is then compressed to the original volume $V_1$ adiabatically. If $p_1$ and $p_2$ represent the initial pressure and final pressure respectively,and $W$ represents the net work done by the gas during the entire process,then:

In Column-$I$ processes and in Column-$II$ the first law of thermodynamics are given. Match them appropriately:

Column-$I$ Column-$II$

$(a)$ Adiabatic $(i)$ $\Delta Q = \Delta U$

$(b)$ Isothermal $(ii)$ $\Delta Q = \Delta W$

$(iii)$ $\Delta U = -\Delta W$

One mole of a monoatomic gas and one mole of a diatomic gas are initially in the same state. Both gases are expanded isothermally and then adiabatically,such that they acquire the same final state. Choose the correct statement.

When a monatomic gas expands at constant pressure,the percentages of heat supplied that is used to do external work and to increase its internal energy are respectively:

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