The formation of rust (Fe2O3) from solid iron and oxygen gas releases -1.7  103 kJ. 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) ΔH = -1.7  103 kJ   How many kJ are released when 8.0 g Fe react?

Q: 2C2H6 (g) + 7O2 (g) → 4CO2(g) + 6H2O (g) ΔH = -1560 kJ How much heat (in kJ) is released if 11.1 g…

A: Moles of ethane=11.1/30=0.37

Q: Consider the following thermochemical reaction: 6 HCl(g) + 2 BCl3(g)-->B2H6(g) + 6Cl2(g) ΔHrxn =…

A: Given :-  6 HCl(g) + 2 BCl3(g)-->B2H6(g) + 6Cl2(g) ΔHrxn = +755.4 kJ  To calculate :-  mass of…

Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 71 J…

A: The relationship between the parameters is given as where w = work and q = heat

Q: Sulfur dioxide gas reacts with oxygen to form sulfur trioxide in an exothermic reaction according to…

A: Given mass of SO2 = 58 g

Q: A cylinder contains a mixture of gases under constant atmospheric pressure. The gases undergo a…

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Q: What is the change in internal energy

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Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 73 J…

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Q: Carbon occurs in two forms, graphite and diamond. The enthalpy of the combustion of graphite is…

A: given,  1) combustion of graphite C (graphite) + O2(g) → CO2(g) ,   ΔH1 = -393.5 KJ     -1 2)…

Q: What is the change in internal energy when a system is heated with 35 J of energy while it does 15 J…

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Q: The combustion of butane, C4H10, is given as: 2C4H10(g) + 1302(g) → 8CO2(g) + 10H20(1), AH° = -5314…

A: Given , ∆H ° = -5314 KJ

Q: A cylinder contains a gas under constant atmospheric pressure. When 0.384 kJ of heat is added to the…

A: Given that : The amount of heat added to the gas (q) = 0.384 kJ Work done (W) = 553 J

Q: When 1 mole of CH4(g) reacts with H2O(g) to form H2(g) and CO(g) according to the following…

A: Since,  1 mole of CH4(g) reacts with H2O(g) to form H2(g) and CO(g) 206 kJ of energy are absorbed.…

Q: 4. How much work is done by or on the system (state which), in kcal, in a reaction if the internal…

A: To calculate the work done by or on the system , we would Calculate value and sign of w using first…

Q: In a reaction, gaseous reactants form a liquid product. The heat absorbed by the surroundings is…

A: Given :  Heat absorbed = q = 26.0 kcal  1kcal = 4.184 KJ 26 kcal = 26 * 4.184 KJ = 108.784 KJ q =…

Q: What is the internal energy of a system that has 45.2 J of work done to it and releases 74.6 J of…

A: Given, work done on system ,W = 45.2 J Heat released from system to sorroundings, q  = 74.6 J

Q: A 27.3 g sample of ethylene glycol, a car radiator coolant, loses 695 J of heat. What was the…

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Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 68 J…

A: The process happening on the system is of two steps given as,

Q: The process of dissolving ammonium nitrate,NH4NO3, in water is an endothermic process. a)what is…

A: Given Mass of ammonium nitrate = 4.40 g Mass of water = 100 g Heat absorbed by NH4NO3 = 3.30*102 J/g…

Q: A cylinder contains a mixture of gases under constant atmospheric pressure. The gases undergo a…

A: The thermodynamics is the branch of science which deals with the heat and other forms of energy.…

Q: Consider the following reaction: 2 Al (s) + Fe2O3 (s) → 2 Fe (s) + Al2O3 (s)    ΔH = -850 kJ What…

A: Given the chemical reaction as follows,2 Al (s) + Fe2O3 (s) → 2 Fe (s) + Al2O3 (s)   ;  ΔH = -850…

Q: A cylinder contains a gas under constant atmospheric pressure. When 0.434 kJ of heat is added to the…

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Q: When 1 mole of CH4(g) reacts with O2(g) to form CO2(g) and H2O(g) according to the following…

A: Since When 1 mole of CH4(g) reacts with O2(g) to form CO2(g) and H2O(g) according to the equation…

Q: 1. How much work was done when 46 kJ of energy was spent on compressing a gas as it released 28 kJ…

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Q: 2. The specific heat of tin is 0.222 J/g °C. The specific heat of lead is 0.126 J/g °C. Which metal…

A: Specific heat is defined by the amount of heat needed to raise the temperature of 1 gram of a…

Q: If 800 J of heat is added to a system when it does 500 J of work, what is the change in internal…

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Q: 4. Gasohol contains ethanol (C2H5OH), which when burned reacts with oxygen to produce water and…

A: A reaction is exothermic if heat is released ( ΔH is negative ) and reaction is endothermic if heat…

Q: When 25.0 g hydrogen gas react according to the following reaction, how many kJ of heat are released…

A: Given thermochemical equation is  CO(g) + 3H2(g)   --> CH4(g) + H2O (g)  ;  ∆Hrxn = – 206 kJ Mass…

Q: (1) Calculate (a) q when a system does 54 J of work and its energy decreases by 72 J. (b) DE for…

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Q: When 1 mole of H₂S(g) reacts with H₂O(1) to form H₂(g) and SO₂(g) according to the following…

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Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 75 J…

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Q: & How much work is done by or on the system (state which), in kcal, in a reaction if the internal…

A: Given: Mass of water = 185 g. Initial temperature of water = 20.0 oC Final temperature of water =…

Q: Which statement is true of the internal energy of the system and its surroundings following a…

A: The first law of thermodynamics states that the energy of the universe is constant i.e. the sum of…

Q: In the following reaction, how many moles of CH3OH are required to give off 5576 kJ of heat? 2 CH;OH…

A: To determine Moles of CH3OH required to give off heat 5576 KJ

Q: A chemical system produces 170. kJ of heat and does 18 kJ of work. What is AE for the surroundings?…

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Q: The oxidation of glucose, C6H12O6(s), is described by the following thermochemical equation:…

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Q: If a system absorbs 155.0 kJ of heat from its surroundings and the system does 35.0 kJ of work on…

A: Since we know that according to the first law of Thermodynamics ∆E = q + w  Where , ∆E = change in…

Q: 1. Write the thermochemical equation for the following reactions that occur at constant pressure:…

A: The chemical equation is aid to be the thermochemical equation which gives the information about the…

Q: How many kilojoules of heat are produced when 34.0 g of Fe,O3 reacts with an excess of CO according…

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Q: In a calorimetric experiment, 6.24 g of lithium hydroxide, LIOH, was dissolved in water. The…

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Q: Calculate the temperature change when 5.76J of heat is released in a calorimeter having a heat…

A: Heat release= heat capacity* rise in temperature

Q: of

A: According to 1st law of thermodynamics  Change in internal energy= Q-W Q= heat added to the system…

Q: The combustion of propane is represented by the following reaction: 50 21g) 3CO2(8) 4H2O(g) 2043 kJ…

A: The balanced reaction taking place is given as, => C3H8 (g) + 5 O2 (g) ---------> 3 CO2 (g) +…

Q: One origin of SO3 is the combustion of sulfur, which is present in small quantities in coal. S(s) +…

A: Given the formation of SO3(g) from sulfur, and combustion enthalpy ofsulfur and sulfur dioxide.we…

Q: A system undergoes a process consisting of the following two steps: Step 1: The system absorbs 74 J…

A: We have given that a system undergoing a process consisting of two given steps. And asked for the ∆E…

Q: The value of ΔH0 for the reaction CH3OH(l) → CO(g) + 2H2(g) is +128.1 kJ. Determine the heat…

A: Given, The balanced chemical equation is given below, CH3OH(l) → CO(g) + 2H2(g) ΔH0=+128.1 kJ

Q: If a system absorbs 155.0 kJ of heat from its surroundings and the system does 95.0 kJ of work on…

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Q: Calculate the value of ΔE in joules for a system that loses 50 J of heat and has 150 J of work…

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Q: When 25.0 g hydrogen gas react according to the following reaction, how many kJ of heat are released…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: Which of the following (with specific heat capacity provided) would show the smallest temperature…

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