Need help with couple of questions

A chemical reaction is run in which 726 Joules of heat are generated and 178 Joules of work are done on the system, Calculate the change in the Internal energy of the chemical system A E = Joules Expressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table The Joule () is the SI unit of energy 1 calorie (cal) 1.184 3 ku 601 118 0.880 In the laboratory a student finds that it takes 214 Joules to increase the temperature of 12.0 grams of gaseous nitrogen from 21.9 to 39.1 degrees Celsius. The specific heat of nitrogen calculated from her data is Wg