Self-test 3.4: Estimate the enthalpy change for the combustion of liquid ethanol to carbon dioxide and liquid water under standard conditions by using the bond enthalpies, mean bond enthalpies, and the appropriate standard enthalpies of vaporization. KJ/mol. 4 sig. figure normal format.

Calculate the change of enthalpy for the reaction 2AI (s) + 3C12 (g) --> 2AICI3 (s) from the following reactions: Reaction 1: 2AI (s) + 6HCI (aq) --> 2AICI3 (aq) + 3H2 (g) Change in enthalpy: -1049 kJ Reaction 2: HCI (g) --> HCI (aq) Change in enthalpy: -74.8 kJ/mol Reaction 3: H2 (g) + Cl2 (g) --> 2HCI (g) Change in enthalpy: -1845. kļ/mol Reaction 4: AICI3 (s) --> AICI3 (aq) Change in enthalpy: -323. kJ/mol Include the following: • The numerical answer with correct units. • State which reactions, if any, you had to "Flip". • State which reactions you had to multiply, if any, to get the correct amount of the compound.

Please help me with the following question and explain it pls making sure its 100% correct. I keep getting this answer but it marks me wrong I am not sure whats wrong, pls help thank you

P2C.6 For the reaction Cr(C,H,),(s) → Cr(s) +2OC,H,(g), A̟U°(583 K) = +8.0 kJ mol'. Find the corresponding reaction enthalpy and estimate the standard enthalpy of formation of Cr(C,H),(s) at 583 K. %3D

Please don't provide handwritten solution ....

-1 -1 A 30.0 g sample of polyisoprene, which has a specific heat capacity of 1.880 J.g¹ºC, is dropped into an insulated container containing 250.0 g of water at 30.0 °C and a constant pressure of 1 atm. The initial temperature of the polyisoprene is 87.8 °C. Assuming no heat is absorbed from or by the container, or the surroundings, calculate the equilibrium temperature of the water. Be sure your answer has 3 significant digits. [°C G

Using the provided table, determine the enthalpy for the reaction

I got -1366.7 but I don't think that's right.