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- 6 S+0₂ 250₂ 25 + - 30₂ 0₂-2503 S0₂ - 2503 AH--196 KJ AH-790kJS_engine.html?ClassID=10877573352# Calculate the enthalpy of vaporization for the phase change from liquid water to water vapor. H20(1) – H2O(g) Compound AH°, (kJ/mol) H,O(1) H,O(g) -286 -242 AHvap = [ ? ] kJ/mol Enter either a + or sign and the magnitude. EnterHelp ce/acellus_engine.html?ClassID=1246112631# ew Student Orie. Using the data below, calculate the enthalpy for the oxidation of magnetite to hematite. 2FE3 O4(s) + O2(g) → 3FE2O3(s) Compound AH, (kJ/mol) f Fe,0,(s) -1118.4 0,(8) 0.0 Fe,0,(s) -824.2 AHn = [ ? ] kJ Enter either a + or - sign AND the magnitude. rxn Enthalpy (kJ) Enter
- ellus_engine.html?ClassID=1087757335# Calculate the standard reaction enthalpy for the reaction between NO and O3. NO(g) + O3(g) NO2(g) + O2(g) Compound AH°; (kJ/mol) NO(g) 90. AHxn = [ ? ] kJ %3D 0,(8) NO,(g) 143 34 Enter either a + or - sign and the magnitude. Enters_engine.html?ClassID=D1087757335# Calculate the standard reaction enthalpy for the reaction between CIF3 and O2. 2CIF3(g) + 202(g) → Cl½0(g) + 30F2(g) Compound AH°, (kJ/mol) CIF3 Cl,0 OF, -163.2 AH20 = [ ? ] kJ 80.3 24.5 2 Enter either a + or - sign and the magnitude. ΔΗ,rxn (k) Enterq= cAT = msAT = ms(Tinal – Tiniia) AHΧΣn, ΧΑΡ(prod)] - Σn, ΧΔΗ (react)] 1. The enthalpy of which of the following reactions would not be the enthalpy of formation of the product? a) 1/2 H,(g) + 1/2 Br:(1) ---> HBr(g) c) H,O(1) + SO,(1) ---> H,SO,(1) b) H.(g) + 1/2 O,(g) H;O(1) d) Ca(s) + 1/2 O:(g) ---> CaO(s) --->
- The British thermal unit (Btu) is commonly used in engineering applications. A Btu is defined as the amount of heat required to raise the temperature of 1 lb of water by 1 °F. There are ________ Btu in one Joule. 1 lb = 453.59 g; °C = (5/9)(°F - 32°); specific heat of H2O (l) = 4.184 J/g-K.Esc ||| = OTHERMOCHEMISTRY A student runs two experiments with a constant-volume "bomb" calorimeter containing 1200. g of water (see sketch at right). Calculating heat of reaction from bomb calorimetry data First, a 5.000 g tablet of benzoic acid (C6H,CO₂H) is put into the "bomb" and burned completely in an excess of oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is observed to rise from 16.00 °C to 38.96 °C over a time of 9.2 minutes. 2 4. Next, 5.730 g of acetaldehyde (C₂H₂O) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 16.00 °C to 42.19 °C. 84°F Sunny Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: FI Explanation Is this reaction exothermic, endothermic, or neither? 4- F₂ Check 2C₂H4O(g) + 50₂(g) 4CO₂(g) + 4H₂O(g) Be sure any of your answers that are…C2H5OH + 3O2 → 2CO2 + 3H2O ΔH⁰ = - 791.4kJ/mol How much heat will be released when 10.0g of ethanol reacts with excess oxygen? [ Select ] ["-7914 kJ", "- 171.7 kJ", "-0.013 kJ", "171.7 kJ"] Is the reaction endothermic or exothermic? [ Select ] ["endothermic", "exothermic"]
- lus_engine.html?ClassID=1834324617# f The energy for the system to reach 20.5 °C is supplied by a chunk of hot metal. What would be the initial temperature of a 30.0 g piece of the metal? qmetal= -2113 J Cmetal = 0.575 J/g°C T₁ = [?] °C Initial Temp (°C) Enters_engine.html?ClassID=2134898241# An original reaction and enthalpy is given below. 2CH4(g) + 302(g) → 2C0(g) + 4H2O(g) AH = -1168 kJ %3D What is the enthalpy for the altered reaction below? CO(g) + 2H2O(g) → CH¼(g) + O2(g) AH = [ ? ] kJ %3D Enter either a + or - sign AND the magnitude. EnterS_engine.html?ClassID=1109578016# During the reaction, the water temperature rises from 25.00 to 28.54 °C. The heat capacity of the calorimeter, including water, is 5860 J/°C. Calculate the heat of reaction in Joules. 9rxn = [?] J Hint: Let the units guide your calculation set up! Enter either a + or - sign AND the magnitude. Do not round until the end. q.rxn (J) Enter