Question

If a particular reaction absorbs 252 kJ of heat while doing 105 kJ of work at constant pressure. What are the ΔE and ΔH for values for the reaction? Is the reaction endothermic or exothermic?

Answer 1

q = 252 kJ and it's + so is endothermic
w = 105 kJ and it's - since it is doing the work.
delta E = q+w
delta E = +252 kJ + (-105 kJ)

Answer 2

what about the delta H?

Answer 3

delta H at constant pressure is q. Or perhaps I should say it another way,k q at constant pressure is delta H. So delta H in this case is +252 kJ.