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(B) According to the first law of thermodynamics,$\Delta Q = \Delta U + W$.In an adiabatic process,there is no exchange of heat with the surroundings,

Vedclass · Accepted Answer

Statement $1$ is true,Statement $2$ is false.

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(B) According to the first law of thermodynamics,$\Delta Q = \Delta U + W$.In an adiabatic process,there is no exchange of heat with the surroundings,so $\Delta Q = 0$.Therefore,$0 = \Delta U + W$,which implies $\Delta U = -W$ or $W = -\Delta U$.This means the change in internal energy is equal to the negative of the work done by the gas (or equal to the work done on the gas). Thus,Statement $1$ is true.In an adiabatic process,the temperature of a gas changes because the internal energy changes as work is done. Therefore,Statement $2$ is false.

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