If you react 30 g of methane with 50g of water to form methanol and hydrogen gas. What is the ΔHrxn?
Hess’s LawTake a given set of several equations and flip or multiply them so that they add up to give the desired equation. Find the sum of the individual ΔH’s for each part to find the ΔH of the entire reaction.ProblemsGiven•N2H4(l) + CH4O(l) → CH2O(g) + N2(g) + 3H2 (g) ΔH = -37 kJ •2NH 3(g) → N2(g) + 3H2(g) ΔH = +46 kJ •CH2O(g) + H 2(g)→ CH4O(l) ΔH = +65 kJ Find the ΔHf:•N2H4(l) + H2(g) → 2NH3(g)Given:•4C (s) + 5 H2(g) C4H10(g) ΔH = -124.7 kJ•C (s) + O2(g) CO2(g) ΔH = -393.5 kJ•2H2(g) + O2(g) 2 H2O (g) ΔH = -483.6 kJ•H2O (l) H2O (g) ΔH = +44 kJFind the ΔHf of the combustion of butane:•2C4H10(g)+ 5O2(g) 8CO2(g) + 10H2O (l)
Calorimetry:1.Compound B is burned in a bomb calorimeter that contains 1.50 liters of water. When I burned 50.0 grams of compound B in the calorimeter, the temperature rise of the water in the calorimeter was 35.00 C. If the heat of combustion of compound B is 2,150 kJ/mol, what is the molar mass of compound B?2.A 200mL volume of hot water (99.2°C) Is cooled with the addition of five ice cubes at a temperature of -3°, each with a mass of 1.62g. What is the final temperature of the sample once all the ice has melted?
3.100 g of an unknown metal at 94ºC is placed in 100. grams of water at 10.ºC. The final temperature of the metal and water are 17ºC. What is the heat capacity of the unknown metal? 4.350mL of 2.16M H2SO4 is added to 400mL of .54M NaOH at room temperature (25° C) in a constant pressure calorimeter with a heat capacity of 950 J/K. What is the final temperature? Electron Configuration and Quantum Mechanics1.Give the electron configuration for the following compounds:a.33Asb.106Sg
2.Quantum Numbersa.Explain the significance of each quantum number, and give an example of a set of quantum numbers for a valence electron in a sulfur atom. b.How many f orbitals have the value n = 3?c.How many electrons in an atom can have the quantum numbers n = 3, l = 2?d.How many electrons can be described by the quantum numbers n = 3, l = 3, m1?l=
Periodic Table TrendsAtomic RadiusIncreases down and to the leftHow big an atom isIonization energyIncreases up and to the rightHow much energy it takes to remove an electronElectron affinityIncreases up and to the rightHow much an atom wants an electronElectronegativityIncreases up and to the rightList the following compounds in order of increasing radius. S, N ,O, W, F, La, K