A 40 g block of ice is heated from -15℃ to its melting point. After the block of ice completely melts, it reaches a final temperature of 16.5℃. Calculate the amount of heat involved in this process. Is this process endothermic or exothermic? Explain your reasoning. pls show the work

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 :

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a