Energy and chem rxn 2022 Prachi Patel

Sign in Week 15 Recitation Caleb Young Oklahoma - CHEM 1315 (Section 001) - Fall20 - ROCHER > Activities and Due Dates > Week 15 Recitation O Assignment Score: 50% Resources O Hint Check Answer Question 9 of 10 > When methanol, CH, OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is released. For this 2: reason, it is often used as a fuel in high performance racing cars. The combustion of methanol has the balanced, thermochemical equation CH,OH(g) + 0,(g) → CO,(g) + 2H,O(1) AH = –764 kJ How much methanol, in grams, must be burned to produce 629 kJ of heat? 26.33 mass: TOOLS x10 about us careers privacy policy terms of use contact us help 5:14 PM 12/11/2020 50

reading: The accelerometer keeps track of how quickly the speed of your vehicle is changing. When your car hits another car—or wall or telephone pole or deer—the accelerometer triggers the circuit. The circuit then sends an electrical current through the heating element, which is kind of like the ones in your toaster, except it heats up a whole lot quicker. This ignites the charge which prompts a decomposition reaction that fills the deflated nylon airbag (packed in your steering column, dashboard or car door) at about 200 miles per hour. The whole process takes a mere 1/25 of a second. The bag itself has tiny holes that begin releasing the gas as soon as it’s filled. The goal is for the bag to be deflating by time your head hits it. That way it absorbs the impact, rather than your head bouncing back off the fully inflated airbag and causing you the sort of whiplash that could break your neck. Sometimes a puff of white powder comes out of the bag. That’s cornstarch or talcum powder to…

Name (please print): Fall 2022 Basic Laboratory Operations Post Lab Questions 1.) Suppose you're attempting to measure the density of a liquid that is highly volatile (it evaporates quickly). If you first measure the mass and then several minutes later you measure the volume of the liquid will the measured density be higher than the true value, lower than the true value, or the true density of the liquid. [It helps to understand this problem with the density equation.] 2.) Suppose you're attempting to measure the density of a liquid that is highly volatile (it evaporates quickly). If you first measure the volume and then several minutes later you measure the mass of the liquid will the measured density be higher than the true value, lower than the true value, or the true density of the liquid. [It helps to understand this problem with the density equation.] 3.) You're attempting to calculate the density of an alloy. The alloy is in the shape of a cylinder. If the mass of the alloy is…

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- CVICW T C OnstaILS IT CTIOUIC Tg When 0.540 g of biphenyl (C12 H10) undergoes combustion in a bomb calorimeter, the temperature rises from 24.9 °C to 30.1 °C. You may need to reference (Pages 379 - 381) Section 9.5 while completing this problem. Part A Find AErxn for the combustion of biphenyl. The heat capacity of the bomb calorimeter, determined in a separate experiment, is 5.86 kJ/° C. Express the energy in kilojoules per mole to three significant figures. V ΑΣφ kJ/mol ΔΕΧ rxn Request Answer Submit

Safari File Edit View History Bookmarks Window Help Mon Sep 28 3:13 PM session.masteringchemistry.com Test Chapter 5 Hide Timer Item 16 16 of 20 v Complete I Review I Constants I Periodic Table A high-protein diet contains 63.6 g of carbohydrate, 5.9 g of fat, and 140 g of protein. TABLE 3.7 Typical Energy Values for the Three Food Турes Part A How much energy, in kilocalories, does this diet provide? (Round off the kilocalories to the tens place.) Food Type kcal/g kJ/g Express your answer to two significant figures and include the appropriate units. Carbohydrate 4 17 Fat 9. 38 Protein 4 17 Submit Previous Answers Completed; correct answer withheld by instructor Part B How much energy, in kilojoules, does this diet provide? (Round off the kilojoules to the tens place.) Express your answer to three significant figures and include the appropriate units. Submit Previous Answers Completed; correct answer withheld by instructor Provide Feedback Next > 00

Consider the following data for bromine: atomic mass 79.904 mol electronegativity 2.96 kJ 324.6 mol electron affinity kJ 1139.9 mol ionization energy kJ 5.8 mol heat of fusion

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The following table is the data table recorded in the lab for the reactions listed on in your VCL 3-12. Parameter Reaction 1 Reaction 2 Reaction 3 Mass NaOH 3.9982 3.9958 25.00 25.00 24.99 Initial temperature (°C) 30.05 36.05 30.84 Final temperature (°C) Assuming the experiments are done exactly as describe in VCL 3-12, calculated the energy released, in kJ/mol, of NaOH in each reaction. Show all calculation steps.

Now, in the actual Beirut explosion, 2750. metric tons of ammonium nitrate reacted in the presence of fuel. (1 metric ton = 1 Mg) 11.How many liters of gas were produced? 12.How much heat was released?

Consider the following data for iridium: 192.22 mol atomic mass electronegativity 2.20 kJ 151.0 mol electron affinity kJ 880. mol ionization energy kJ 26. mol heat of fusion You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release absorb (1) r @) + e → Ir(<) Ir (g) Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? no

If 10g of methane combust completely, find how much energy is released in the reaction given; CH4 + 2O2 --> CO2 + 2H2O, ∆H = - 890kJ

Figure 40 Petroleum 30 Natural gas Coal Nuclear electric power Hydroelectric power Wood 1800 1825 1850 1875 1900 1925 1950 1975 2000 Year Since 1800, the main sources of energy have been fossil fuels, with other sources contributing less than 20% of the total. Chapter 3, Question 49 Using information in the figure above, calculate the total world energy consumption in 1975. i x 10 i kJ eTextbook and Media Save for Later Attempts: 0 of 3 used Submit Answer Energy consuption by source, 1018 kJ/yr

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Consider the reaction below: A + 2B → C You carry out a reaction using .100 moles A and .150 moles of B in a calorimeter with Ccal = 4.12 kJ/°C. Given the data below, what is the enthalpy of reaction in kJ/mol? Temperature (°C) 26 25 24 23 22 -110 0 30 60 Time (s) 90 Check the sign of AH, make sure you scale by moles of reaction.

D21 1120 Ch-13 Homework - General Chemistry II W 1120 Ch-12 Homewart Write a balanced chemical equation for each reaction. (Include states-of-matter under the given conditions in your answer.) (a) combustion of acetylene (ethyne, C₂H₂(g)) to form carbon dioxide gas and water vapor The reactants are acetylene and oxygen (because this is a combustion reaction) and the products are carbon dioxide gas and water. The Help chemPad XX (b) synthesis of NO(g) from N₂O(g) and NO₂(g) The reactants are N₂O and NO2, and the product is NO. The balanced chemical equation is the following. Help chemPad XX¹ chemPad XX Greek ← ->> (c) reaction of solid carbon graphite with water vapor to produce carbon monoxide gas and hydrogen gas The reactants are C and H₂O, and the products are CO and H₂. The balanced chemical equation is the following. Greek → Help Greek -

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

Material: Block Mass: Wood 5.0 g 10.0 g Heating Duration: 3 s I final Heat Reset Tinitial 150 J has been transferred to the block. 20.0 °C 37.0 °C Experiment Complete Click Reset for a new experiment. Set the simulation to the following parameters and run the experiment by clicking Heat. Material: Copper Heating Duration: 2.0 s Block Mass: 5.0 g What is the final temperature of the block? °C

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3. Circle the processes that are nonspontaneous Climbing stairs dissolving salt in water Converting table salt (NaCl) to its elements 2 H2O(1) → 2 H2(g) + O2(g) O Type here to search 12:20 AM 4/24/2021 80 D FIG H GIRAK

Core Chemistry Skill: Balancing a Chemical Equation 5 of 33 > to form four moles of the product, water. Part A Balance the chemical equation by indicating the number of each species in the appropriate blanks. For this exercise, indicate coefficients of 1 explicitly. Match the numbers in the left column to the appropriate blanks in the chemical equations on the right. Make certain the chemical equation is complete before submitting your answer. • View Available Hint(s) Reset Help 1 Fe (s) + H2O (1) → Fe3 04 (s) + 2 Н2 (9) 3 4 Submit Previous Answers

This energy diagram is for the thermal decomposition of solid aluminum oxide that yields solid aluminum and oxygen gas.  Write a balanced equation for the reaction.  Explain what feature is shown by the arrow labeled (a) and what it means.  Using chemical symbols and dashed lines (this can be done with type), draw what the activated complex or transition state might look like.  Is this reaction exothermic or endothermic? Explain.

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1. Progress of Reaction Potential Energy Diagram Equation + Match each of the potential energy diagrams above with the equation below. Use each of the diagrams only once + 2. N₂(g) + 20₂(g) + 11.1 kJ → N₂O4(9) N₂(g) + O₂(g) → 2NO(g) 0.0 Progress of Reaction FeO (s) + CO(g) → CO₂(g) + Fe(s) AH° +197 kJ 2CH3OH(1) + 30₂(g) → 2CO₂(g) + 4H₂O(g) + 1275.8 kJ A,H° -11.0 kJ 3. Ep (kJ) Progress of Reaction Ep Progress of Reaction