State and explain First law of thermodynamics? Apply it to the Isothermal process
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From the first law of thermodynamics, dQ = dU + dW. Therefore, dQ = dW = PdV. (a) Therefore, if a gas is to expand isothermally, then an amount of heat equivalent to the work done by the gas will have to be supplied to it from the external source. (b) During isothermal compression, dV will be negative.
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