The standard enthalpy change for the following reaction is -170kJ at 298 K. 2 Cu(s) + 1/2 O2(g) Cu2O(s) ΔH° = -170 kJ What is thestandard enthalpy change for the reaction at 298 K? 4 Cu(s) + O2(g)2 Cu2O(s)
A student determines the heat of dissolution of solid cobalt(II)chloride using a coffee-cup calorimeter of negligible heatcapacity. When 1.33 g of CoCl2(s) is dissolved in 111.00 g ofwater, the temperature of the solution increases from 25.00 to26.84 °C. Based on the student's observation, calculate theenthalpy of dissolution of CoCl2(s) in kJ/mol. Assume the specificheat of the solution is 4.184 J/g°C.
