Keywords: کالری سنجی احتراق بمب چرخان; 2-Bromoacetophenone; 2′-Bromoacetophenone; 3′-Bromoacetophenone; 4′-Bromoacetophenone; Rotating bomb combustion calorimetry; Enthalpy of vaporization; Enthalpy of sublimation; Calvet microcalorimetry; Standard molar enthalpy of formation; Thermochemistry;