The heat of combustion of ethyne, carbon, and hydrogen gas are -1300 kJ/mol, - 394 kJ/mol and -286 kJ/mol respectively. By manipulating the information given, calculate the enthalpy of formation of ethyne from the reaction between carbon and hydrogen gas.
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- (a) Calculate the standard enthalpy change for the combustion of 1 mol of benzene, C6H61l2, to CO21g2 and H2O1l2.(b) Compare the quantity of heat produced by combustion of 1.00 g propane with that produced by 1.00 g benzene.(a) When the metallic element sodium combines with the nonmetallic element bromine, Br2(l), how can you determine the chemical formula of the product? How do you know whether the product is a solid, liquid, or gas at room temperature? Write the balanced chemical equation for the reaction. (b) When a hydrocarbon burns in air, what reactant besides the hydrocarbon is involved in the reaction? What products are formed? Write a balanced chemical equation for the combustion of benzene C6H6(l), in air.Calculate the enthalpy of benzene from its enthalpy of combustion and the enthalpy of combustion of cyclohexane
- Propane, C3H8, is a hydrocarbon that is commonly used as a fuel.(a) Write a balanced equation for the complete combustion of propane gas.(b) Calculate the volume of air at 25 °C and 1.00 atmosphere that is needed to completely combust 25.0 grams of propane. Assume that air is 21.0 percent O2 by volume. (Hint:use the information that 1.00 L of air at 25 °C and 1.00 atm contains 0.275 g of O2 per liter.)(c) The heat of combustion of propane is −2,219.2 kJ/mol. Calculate the heat of formation, ΔH°f of propane given that ΔH°f of H2O(l) = −285.8 kJ/mol and ΔH°f of CO2(g) = −393.5 kJ/mol. (d) Assuming that all of the heat released in burning 25.0 grams of propane is transferred to 4.00 kilograms of water, calculate the increase in temperature of the water.Write a balanced chemical reaction for the incomplete combustion of pentane, C5H12C5H12 in oxygen gas to form carbon monoxide gas as one of the products.The combustion of isoctane reaction produces -5099.5 kJ of heat per mole of C8H18 (g) consumed, under standard conditions. The enthalpy of formation (DHf) for CO2(g) and H2O (g) are -393.5 kJ/mol and -241.8 kJ/mol, respectively. Find the standard enthalpy of formation (DHf) of this isomer of C8H18 (g)? (Show work) C8H18 (g) + O2(g) -> 8CO2(g) + 9H2O(g) DHrxn = -5099.5 kJ
- MTBE, Methyl tert-butyl ether, CH3OC(CH3)3, is used as an oxygen source in oxygenated gasolines. MTBE is manufactured by reacting 2-methylpropene with methanol.(a) Using Lewis structures, write the chemical equation representing the reaction.(b) What volume of methanol, density 0.7915 g/mL, is required to produce exactly 1000 kg of MTBE, assuming a 100% yield?Draw the enthalpy diagram for the formation of octane.The average bond enthalpy for C-His 413 kJ/mol. 413 kJ of energy is required to break a mole of CH into atoms: CH(g)→C(g) + H(g), AH=413 kJ Using this information, and your answer from Part A, calculate the enthalpy change of the reaction from Part B. That is, calculate the energy required to break only the carbon-carbon bonds in benzene. Express your answer to four significant figures and include the appropriate units. > View Available Hint(s) HA AHrxn = Value Units Submit Part D Complete previous part(s) Next > Provide Feedback 9:33 PM B. W Word Google .. Spotify .. 61°F 11/17/2021
- (a) When a compound containing C, H, and O is completelycombusted in air, what reactant besides the hydrocarbonis involved in the reaction? (b) What products form in thisreaction? (c) What is the sum of the coefficients in the balancedchemical equation for the combustion of one mole ofacetone, C3H6O1l2, in air?(a) What is the difference between chlorofluorocarbons and hydrofluorocarbons?Illustrate the chemical structural formula for 3-methyl-3-ethylpentane. (b) Identify its chemical family as an isomer. (c) Provide the balanced chemical reaction equation for the combustion of one mole of this fuel with an equivalence ratio of ϕ=0.735