2. Calculate the work done when 8.0L of a gas expands to 10.5L against a constant pressure of 3.0atm. 3. A gas absorbs 118kJ of heat while 24kJ of work is done one it. Calculate E. 4. For the following reaction, what is the value of H if the stoichiometry of the reaction is doubled? N2(g)+3H2(g)2NH3(g)Hxn=92.6kJ/mol 5. How much heat is evolved when 25gS is burned according to the following reaction? Assume there is excess O2. S(s)+O2(g)SO2(g)Hxn=296kJ/mol Latm=101.325J specific heat of H2O=4.184J/gC density of H2O=1g/m