In which region is the substance in both the solid phase and the liquid phase ?

Region 3

Explanation:

When there is a continual increase in temperature, a substance undergoes change of state. From the diagram, the substance would be a complete solid in region 1 because of the very low temperature. At region 2, the temperature has increased but it still retain its initial state. But at region 3, the substance start to melt as the temperature increases, thus existing as solid and liquid.

where's the diagram?

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :