Use the enthalpy for the combustion of propane (C3H8) to compare the energy from this common fuel to the ammonium nitrate. Calculate the mass in grams of propane that would be needed to release the same amount of energy solved for ammonium nitrate (10620877061.4693 kJ). The Enthalpy of combustion, ΔH = −2220.0 kJ/mol) please help me understand how to solve this quesiton. The answer is 0 g but i dont understand how or why.

In the late eighteenth century Priestley prepared ammonia by reacting HNO3(g) with hydrogen gas. The thermodynamic equation for the reaction is HNO3(g) + 4H2(g) → NH3(g) + 3H2O(g) ΔH = –637 kJ Calculate the amount of energy released when one mole of hydrogen gas reacts. Consider this to be a positive value.  ________ kJ

Determine the enthalpy (in kJ/mol) for the reaction 3 SiCl₄ (s) + 4 Fe (s) → 4 FeCl₃ (s) + 3 Si (s) (Please show steps)

Using the following equation for the combustion of postane, calculate the heat associated with the formation of 100.0 g of phosphorous dioxide.  The molar mass of postane is 263.6 g/mole.  The molar mass of phosphorous dioxide is 62.9 g/mole.               2 P8H18 + 25 O2  →  16 PO2 + 18 H2O    ΔH°rxn = -12018 kJ

The flame in a torch used to cut metal is produced by burning acetylene (C2H2) in pure oxygen. Assuming the combustion of 1 mole of acetylene releases 1251 kJ of heat, what mass of acetylene is needed to cut through a piece of steel if the process requires 90.8  × 104kJ of heat?

Suppose a pair of chemical compounds A and B can react in two different ways: A+B C Reaction 1 gives product C. A+B D Reaction 2 gives product D. The following facts are known about the two reactions: . Both reactions are exothermic, but the heat of reaction of Reaction #1 is larger. • If a reaction vessel is charged ("filled") with A and B, then at first C is produced faster than D. Use these facts to sketch a qualitative reaction energy diagram for both reactions. Note: because these sketches are only qualitative, the energies don't have to be exact. They only have to have the right relationship to each other. For example, if one energy is less than another, that fact should be clear in your sketch. energy ^ A + B Reaction 1 reaction coordinate energy ^ A+B Reaction 2 reaction coordinate X Ś

Determine the energy associated with each of these processes in order to recycle 1.26 mol Cu. The smelting of copper occurs by the balanced chemical equation: CuO(s)+CO(g)Cu(s)+CO2​(g)where ΔH°f,CuO is = –155 kJ/mol. Assume the process of recycling copper is simplified to just the melting of the solid Cu starting at 25°C. The melting point of Cu is 1084.5°C with ΔH°fus = 13.0 kJ/mol and a molar heat capacity, cP,Cu = 24.5 J/mol·°C.

22. Given that the enthalpy of neutralization for the reaction of HCl (a strong acid) and NaOH (a strong base) is always -55.90 kJ per mole of H2O formed, what is the concentration of a 65 mL sample of HCl if the enthalpy of neutralization for the reaction was found to be -5.38 kJ, assuming no heat is lost to the calorimeter?       0.96 M     1.48 M     1.60 M     0.38 M     4.63 M

We can use Hess's Law (and some creativity!) to learn about the energetics of reactions that occur in remote environments. Consider the atmospheric reaction,  NO + O → NO2   (a) Use the dissociation energy of O2, 498.34 kJ/mol, and the standard heats of formation for NO (+90.25 kJ/mol) and NO2 (+33.18 kJ/mol) to derive the enthalpy change for this reaction.

When 1.42 g of iron reacts with 1.80 g of chlorine, 3.22 g of iron(II) chloride (FeCl2, molar mass = 126.75 g/mol) and 6.8 kJ of heat is produced. What is the enthalpy change for the reaction when 1 mole of iron(II) chloride is produced? round to sig figs