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State and explain the first law of thermochemistry. |
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Answer» Solution :If ENTHALPY of formation of a compound is -x kJ, enthalpy of its decomposition into itselements is +xkJ. EXAMPLE : `C(S) + O_(2)(g) RARR CO_(2) , Delta H = -xkJ` ACCORDING to the LAW (Lavoisier and Laplace law). `CO_(2(g)) rarr C(S) + O_(2)(g), Delta H = +xkJ` |
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