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TH201 : Determination of Partial Molar Enthalpies

TH201 : Determination of Partial Molar Enthalpies by Adiabatic Calorimeter. Aim : To determine the heat of mixing and partial molar enthalpies of two components using adiabatic calorimeter. Theory : Heat of mixing. Adiabatic Calorimeter. Theory:.

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TH201 : Determination of Partial Molar Enthalpies

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  1. TH201 : Determination of Partial Molar Enthalpies by Adiabatic Calorimeter Aim :To determine the heat of mixing and partial molar enthalpies of two components using adiabatic calorimeter Theory : Heat of mixing Adiabatic Calorimeter

  2. Theory: For a heating coil: For known amount of heat, Q (Joules) is supplied to calorimeter containing water if ΔT is the observed temperature change, then: Combining the above equations by assuming perfectly adiabatic conditions: The heat evolved due to mixing: The heat of mixing Δhm is given by:

  3. Experimental procedure: • Calculate the water equivalent of thermometer. • Find out the specific heat of pure components. • Measure the change in temperature ΔTm and correspondingly find out the heat of mixing and the specific heat of mixture. • Plot a graph of Δhm vs mole fraction of one of the components. • Find out the partial molar enthalpies of components at given mole fractions

  4. hm hm x1= 0.2 0 x1 1 Calculation of Partial Molar Enthalpies

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