Butane (C_4H_10) releases 2877 kJ per mole during a standard combustion reaction in air. a. What...
The thermochemical equation for the combustion (i.e., burning) of one mole of benzene under standard conditions is C6H6(l)+15/2O2(g)→6CO2(g)+3H2O(l) with ΔHocomb=–3267.7kJ/mol Is this reaction exothermic or endothermic? How much heat is released when a 5.00-g sample of benzene is burned in excess oxygen under standard conditions? (m.w. C6H6 = 78.11 u)
a) n-Butane (C4H10) is burned with stoichiometric air. Heat is removed and the products of combustion are collected at 1 atm pressure and 40°C. How much heat is removed per mole of fuel, and what fraction of the water in the products is liquid? b) a) n-Butane (C4H10) is burned with an excess of air. Heat is removed and the products of combustion are collected at 1 atm pressure and 40°C. How much air must be used in order to...
The complete combustion of acetic acid, HC2H3O2(l) to form H2O(l) and CO2(g) at constant pressure releases 871.7 kJ of heat per mole of HC2H3O2. (a) Write a balanced thermochemical equation for this reaction. (b) Draw an enthalpy diagram for the reaction.
The combustion of propane (C3H8) produces 248 kJ of energy per mole of propane burned. How much heat energy will be released when 1000 dm^3 of propane are burned at STP?
The liquid hydrocarbon butane, C4H10, used in lighters, releases 2400kj when 1 mole of C4H10 undergoes combustion A. Write the balanced equation B. Is the reaction endothermic or exothermic? C. How many moles of water are produced when 275g of butane reacts? D. How many moles of oxygen are needed to react with 2.25*1024 molecules of butane?
For the reaction below ΔH = -296 kJ per mole of SO2 formed. S(s) + O2(g) → SO2(g) (a) Calculate the quantity of heat released when 1.05 g of sulfur is burned in oxygen. (b) Calculate the quantity of heat released when 0.584 mol of sulfur is burned in air. (c) What quantity of energy is required to break up exactly 9 mol of SO2(g) into its constituent elements?
Question 7 1 pts What is the meaning of the negative sign in the standard enthalpy of combustion of butane (-2877 kJ mol-1) Endothermic reaction Exothermic reaction Enthalpy Thermodynamic reaction
Question 5 2 pts The thermite reaction, which Dr. Jew set off in class (!), is the reaction of iron(III) oxide with aluminum according to the balanced reaction: Fe2O3(s) + 2 Al(s) --> Al2O3(s) + 2 Fe(l) dH = -849 kJ What would be the value of dH if... (a) ... the reaction is reversed? (b) ... the coefficients are all doubled? (c) ... the reaction is reversed and all coefficients are halved? value of dH if the reaction is...
The value of ΔHrxn for the combustion of liquid benzene (C6H6) is -3268 kJ per mole of benzene. How much heat will be released when 25.0 g of O2 is consumed in the combustion of liquid benzene? If 25.0 g of O2 were used to burn gaseous benzene (instead of liquid benzene), would it release more heat or less heat than you calculated in part (a)? Briefly explain how you know.
Combustion of 2.5000 g of propane (C3H8) releases 115.75 kJ of heat when it is burned to form CO2 (g) and H2O (l). The standard formation enthalpies of CO2 (g) and H2O (l) are -393.5 kJ/mol and -285.5 kJ/mol respectively. Calculate the Hrxn for the combustion of propane in kJ/mol Calculate ∆?? ? for propane