Which value (if any) corresponds to a faster reaction: (a) Ea = 40 kJ/mol or Ea = 4 kJ/mol;(b) a reaction temperature of 0 °C or a reaction temperature of 25 °C; (c) Keq = 10 or Keq = 100; (d) ΔHo = −10 kJ/mol or ΔHo = 10 kJ/mol?

I am confused on how to find the enthalpy change with this information. Thank you!

Use the set of three reactions shown below to answer the questions that follow.2NO(g) + O2(g) → 2NO2(g)     ΔH = -116 kJ2N2(g) + 5O2(g) + 2H2O(l) → 4HNO3(aq)     ΔH = -256 kJN2(g) + O2(g) → 2NO(g)     ΔH = +183 kJ What mass of liquid water will be consumed during the production of 21200 J of energy assuming that there is excess nitrogen and oxygen?

A student mixes 67.0 mL of a 2.01 M sodium hydroxide solution with  22.4 mL  of  6.45 M  hydrochloric acid. The temperature of the mixture rises  17.2 ° C.  The density of the resulting solution is 1.00  g   mL  and has a specific heat capacity of 4.184  J   g  ·   ° C . The heat capacity of the calorimeter is 16.97  J   ° C .  Part 1:   (a) Identify the limiting reagent for the reaction.         Part 2:   (b) Calculate the heat of reaction (in J).    qrxn =      ×  10    JEnter your answer in scientific notation.   Part 3 out of 3   (c) Find the enthalpy of neutralization (in kJ/mol). ΔHneutralization =  ____ kj/mol

Which of the following represents an endothermic reaction? O CH4 (g) + 202 (g) → CO2 (g) + 2H2O (g) + 890 kJ 2S02 (g) 25 (s) + 20, (g) + 376kJ O 2C2H6 (g) + 702 (g) → 4CO2 (g) + 6H2O(g) + 3120 kJ 2H20 (g) + 572 kJ → 2H2 (g) + O2 (g)

Calculate Δ­H for the reaction  NO(g) + O(g) → NO2(g) given the following information: NO(g) + O3(g) → NO2(g) + O2(g)                     Δ­H = -198.9 kJ O3(g) → 3/2O2                                                   Δ­H = -142.3 kJ                          O2(g) → 2 O(g)                                                   Δ­H = 495.0 kJ

Cl2(g) + 5F2(g) → 2ClF5(g)  ΔH°=-510.0 kJ ClF3(g) + Cl2(g) → 3ClF(g)  ΔH°=-5.5 kJ Cl2(g) + F2(g) → 2ClF(g)  ΔH°=-113.0 kJ     calculate ΔH° for the reaction:ClF5(g) → ClF3(g) + F2(g)

potential energy diagrams for the following reactions:    2 Ag (s) + Cl2 (g) = 2 AgCl(s) +254 kj

Calculate AH for the reaction. Enter your answer in the provided box. CH3OH + HCI →→→ CH₂Cl + H₂O kJ/mol

2 ·als NaOH, H ethanol heat