When 600 mL of ${\text{0.2 M HNO}}_3$ is mixed with 400 mL of $0.1MNaOH$ solution in a flask, the rise in temperature of the flask is $\_\_\_\_\_\times {10}^{-2}°\text{C.}$ (Enthalpy of neutralisation = 57 kJ ${\text{mol}}^{-1}$ and Specific heat of water = 4.2 ${\text{JK}}^{-1}{\text{g}}^{-1}$ ) (Neglect heat capacity of flask)