The standard molar enthalpies of dissolution of the mixtures {Na3AsO4 center dot 12H(2)O(s) + CuSO4 center dot 5H(2)O(s)} and (NaCuAsO4 center dot 1 center dot 5H(2)O(s) + Na2SO4(s)} in 1.498 mol center dot dm(-3) HCl solution at 298.15 K have been determined to be ...
The enthalpy of dehydration atT=298.15K was measured, and the standard molar enthalpies of formation from the elements were determined by the melt solution calorimetry in accordance with Hess's law. The values ofΔfHm0(T=298.15K) were found to be (2267.2±4.1)kJmol1for natural chalcanthite ...
theenthalpychangefor the reaction between zinc and copper sulphate. Zn (s) + CuSO4 (aq) ZnSO4 (aq) + Cu (s) Introduction In the study of energy (thermodynamics) the system refers to the reacting chemicals (zinc and copper sulphate solution) and the surroundings is everything else (...
the standard molar enthalpy of formation of NaCuAsO4·1.5H2O(s)has been derived:DELTA_fH_m~0(NaCuAsO4·1.5H2O,s,298.15 K)=-(1469.33+-0.65)kJ·mol~(-1).In addition,UV/Vis spectra and refractive indexes of solution A and solution A'were measured to examine the reliability of the ...