In a heat engine, if 700 j of heat enters the system, and the piston does 400 j of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 j?

1,100 j

900 j

1,500 j

300 j

in a heat engine, if 500 j of heat enters the system, and the piston does 300 j of work, what is the final internal (thermal) energy of the system if the initial energy is 1,500 j?
1,700 j800 j1,300 j200 j

The energy is formed by the heat is called thermal energy. This energy is used in various industries such as power plants, paper mills, and etc

According to the question, the first law of thermodynamic is defined as:-

The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic processes, distinguishing two kinds of transfer of energy, as heat and as thermodynamic

The data given in the question is,

From the first law of thermodynamics

Q = ΔU + W

For U2 the given data

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explanation:

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answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.