Hess s law worksheet author. 10 22 2014 2 38 00 am company.
1 check to see if the compounds are on the correct sides of the reaction.
Hess law worksheet pdf. Hess s law worksheet created date. Student worksheet solutions predicting h using hess s law extra exercises solution lsm 5 4 3. Kj mole c 2h 6 g 7 2 o 2 g 2 co 2 g 3 h 2o l h 1560.
Hess s law see at end for supplemental notes on h formation with hess s law the enthalpy change δh r o for a reaction is the sum of the enthalpy changes for a series of reactions that add up to the overall reaction. X last modified by. Calculate h for the reaction c2h4 g h2 g c2h6 g from the following data.
The libretexts libraries are powered by mindtouch and are supported by the department of education open textbook pilot project the uc davis office of the provost the uc davis library the california state university affordable learning solutions program and merlot. Deborah herman created date. Kj mole h2 g 1 2 o2 g h2o l h 285 8 kj mole 2.
Brooklyn city board of education other titles. C2h4 g 3 o2 g 2 co2 g 2 h2o l h 1411. We also acknowledge previous national science foundation support under grant numbers 1246120 1525057 and 1413739.
Calculate h for the reaction 4 nh3 g 5 o2 g 4 no g 6. 3 12 hess s law hess s law states that total enthalpy change for a reaction is independent of the route by which the chemical change takes place hess s law is a version of the first law of thermodynamics which is that energy is always conserved. Chemistry 120 hess s law worksheet 1.
C 2h 4 g 3 o 2 g 2 co 2 g 2 h 2o l h 1411. Kj mole h 2 g 1 2 o 2 g h 2o l h 285 8 kj mole 2. Chemistry 120 hess s law worksheet 1.
4 16 2009 6 04 00 pm company. Kj mole c2h6 g 7 2 o2 g 2 co2 g 3 h2o l h 1560. Calculate h for the reaction 4 nh 3 g 5 o.
2h g 2cl g h2 cl 2 2hcl g a b δh on an energy level diagram the directions of the. Hess s law for a chemical equation that can be written as the sum of two or more steps the enthalpy change for the overall equation equals the sum of the enthalpy changes of the individual steps the enthalpy change for the reaction of no 2 to produce n 2 o 4 can be determined by using a two step path. Hess s law worksheet.
Calculate h for the reaction c 2h 4 g h 2 g c 2h 6 g from the following data.