(N2H4) is a fuel used by some spacecraft. It is normally oxidized by N204 according to the following equation: N2H4(1)+N204(g)→2N2O(g)+2H2O(g) Calculate AHO for this reaction using standard enthalpies of formation. standard enthalpies of formation of N2H4(1)= 50.6 kJ/mol standard enthalpies of formation of N204- 11.1 kJ/mol standard enthalpies of formation of N2O= 81.6 kJ/mol standard enthalpies of formation of H2O (g)= -241.8 kJ/mol ArH. = 380.2 kJ mol-1 ArH=-380.2 kJ mol-1 ArH. = -365.2 kJ mol-1 ArH=-760.2 kJ mol-1

A scientist measures the standard enthalpy change for this reaction to be -739.4 kJ/mol:2CO(g) + 2 NO(g)2CO2(g) + N2(g)Based on this value and the standard formation enthalpies for the other substances, the standard formation enthalpy of CO(g) is

Write a balanced equation for the reaction between gaseous methane (CH4)(CH4) and fluorine gas to produce gaseous carbon tetrafluoride and gaseous hydrogen fluoride. Include phases. balanced equation:   Calculate the standard enthalpy of reaction (Δ?∘rxn).(Δ⁢Hrxn∘). Use the standard enthalpy of formation values in this table of thermodynamic properties. For carbon tetrafluoride, use Δ?∘f=−933.2 kJ/mol.Δ⁢Hf∘=−933.2 kJ/mol. Δ?∘rxn=Δ⁢Hrxn∘=   Suppose that 0.433 mol0.433 mol of methane gas is reacted with 0.904 mol0.904 mol of fluorine gas. Assuming the reaction occurs at constant pressure, how much heat is released? amount of heat released:

Consider the following chemical reaction: C3H8(g) + H2(g) to give C2H6(g) + CH4(g)      ΔH° = ?      Calculate the enthalpy change for the reaction above using Hess's law Thermochemical data: H2(g) + 1\2O2(g) to give H2O(l)           ΔH° =-285.8 kJ  ΔH° combustion for CH4(g)                    ΔH° =-890.0 kJ/mol CO2 giving C(s, graphite) + O2(g)         ΔH°= +393.5 kJ ΔH° combustion for C2H6(g)                    ΔH° =-1560.0 kJ/mol ΔH°f for C3H8(g)                                    ΔH° =-103.8 kJ/mol

The enthalpy of formation of H2O(l) is -285.8 kJ/mol. What is the enthalpy change if 1.62 g H2(g) reacts with 9.21 g O2(g) to form H2O(l)?