Last year a 20 GJ/hr boiler consumed 10,000 GJ of natural gas at $10/GJ. The boiler operates at 9% O2 and 350oC stack temperature rise (STR). What is the savings for correcting that to 4% O2?

Q: How much heat (kJ) is required to convert 1.000 grams of H2O(l) at 25.0 oC to H2O(g) at 100.0 oC?…

A: Given mass of water = 1 g T1 = 25°C T2 = 100°C C = 4.18 J/g.°C ΔH = 44 kJ/mol ΔT = T2 - T1…

Q: A container holds gas at a constant pressure of 8300 Pa. A machine then expands the walls of the…

A: According to the first law of thermodynamics : ∆U = q + w where ∆ u = change in internal energy…

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A: When the heat comes out of a reaction ,the reaction is said to exothermic and if the reaction system…

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Q: Solid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is -632.2 kJ/mol.…

A: The standard enthalpy for a given reaction can be called as the change in the change in the enthalpy…

Q: Given: C6H12O6 (s) + 6 O2 (g) → 6CO2 (g) + 6 H2O (liq) When 3.500 g of glucose, C6H12O6 (MW =…

A: Burning of glucose to give gaseous carbon dioxide and liquid water is an exothermic reaction.In an…

Q: An iron sphere with mass of 7.50 g was placed in a boiling water bath and allowed to sit until…

A: Given that : The mass of the Iron (mi) = 7.50 g  The mass of water in which it is immersed (mw) =…

Q: consider the following balancing process at 700c 2H2 (g) + 2s2 (g) 《》 2H2 (g) An analysis shows that…

A: Consider the balanced chemical equation as: Given data is: Number of moles of H2 = 2.5moles Number…

Q: Calculate the enthalpy change in kJ if 4.76x10^3  L methane gas at 732 torr and 25°C is burned in…

A: Given: Volume = 4.76×103  L Pressure = 732 torr = 0.9631 atm Temperature = 25°C = 298 K   Chemical…

Q: A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns then into…

A: Answer: From the first law of thermodynamics the change in energy, ΔE , in a system is equal to sum…

Q: In a combustion operation, anthracite used showed 92.8% C and 1.3% ash. If this coal is burned in…

A: Anthracite is high rank coal Caol is 92.8% C and 1.3% ash Ash is non combustible The reactions…

Q: 2 A cube of iron was heated to 70 oc and transferred to abeaker containing 100 g of water at 20 oc.…

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Q: The heat of combustion of liquid fuel is 2021 kJ/mol. How much of the fuel is needed to produce a…

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Q: Enthalpy diagram for: a. Calcium carbide is the raw material for the production of acetylene (used…

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Q: You should use care when dissolving H₂SO4 in water because he process is highly exothermic. To…

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Q: A 360-g piece of rebar (a steel rod used for reinforcing concrete) is dropped into 425 mL of water…

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Q: Enumeration. Supply the words/phrases available for answers. 1. Phases of fuels used for external…

A: NOTE - Since you've posted a question with multiple sub-parts, we'll solve only the first three…

Q: Solid urea, (NH2)2CO, burns to give CO2,N2, and liquid H2O. Its heat of combustion is -632.2 kJ/mol.…

A: The given reaction is:

Q: How many grams of acetylene, C2H2, are needed in order to produce 120. kJ of heat according to the…

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Q: Suppose a boil water notice is sent out advising all residents in the area to boil their water…

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Q: Gases A(g) and B(g) are confined in a cylinder-and-piston arrangement like that in Figure 5.4 and…

A: The relationship between the internal energy change, work and heat is given by  ΔE = q + w  where ΔE…

Q: A process heater uses Dowtherm A heat tranšfer to provide the annual operating cost of the heater if…

A: We have 850 kW heat to be provided This heat has to come from the burning of natural gas As, 1kW  =…

Q: iron ore is smelted to produce pure iron according to the following equation:   1 Fe2O3 + 3 CO ->…

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Q: Determine the heat required to raise the temperature of a copper pipe (mass = 422 g) that starts at…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: A sample of solid biphenyl (C12H10) that weighs 0.4858 g is burned in an excess of oxygen to CO2(g)…

A: a.  Balanced reaction is-

Q: When the organic fuel C2H4O combusts the balanced chemical reaction (with lowest whole number…

A: Enthalpy  of combustion is defined for 1 mole substance

Q: The amino acid glycine, C2H5NO2, is one of the compounds used by the body to make proteins. The…

A: Concept - Heat of formation is the amount of heat absorbed or evolved when one mole of a compound is…

Q: When the equation for combustion for ethane is balanced using integer coefficients, the ΔH for the…

A: Combustion of ethane: 2C2H6 + 7O2 ------> 4 CO2 + H2O  ; ∆H = -2834kJ

Q: Ignition wires Thermometer Stirrer heat A sample of solid anthracene (C14H10) that weighs 0.4927 g…

A: The chemical reaction for the combustion of anthracene can be expressed in the form of following…

Q: An industrial process for manufacturing sulfuric acid, H2SO4, uses hydrogen sulfide, H2S, from the…

A: Given information: Density = 2.62 g/L Pressure = 1.00 atm Temperature = 25 °C Molar heat capacity =…

Q: 500+ 350+ 200 475 V (cm) What is the change in thermal energy of the gas during this process? O 55 J…

A: The given information is represented as follows:

Q: 3. During a camping trip, Mr. Lee prepares coffee using a butane stove (C4H10) according to the…

A: Given:

Q: A sulfuric acid plant produces a considerable amount ofheat. This heat is used to generate…

A: The reactions involved in the formation of H2SO4 are as follows: S+O2→SO2…

Q: Two moles a hypothetical ideal gas is taken around the cycle ABCA. Process AB is isochoric, BC is…

A: P denotes pressure, V denotes Volume. T denotes temperature, R is gas constant, n is the number of…

Q: Nadine needs to heat 2.0 L of water from 15ᵒC to 90ᵒC.  A) how much energy is needed to heat the…

A: The effect of pressure and temperature is measured by Boyle’s law and Charles's law respectively.…

Q: A coal sample has the following composition by weight: C = 75 %, O = 4 %, S = 5 %, and ash = 3%. Net…

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Q: The standard heat of reaction for the decomposition of ZnO(s) is ΔH = 348 kJ/mol. What does this…

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Q: A student wishes to determine the enthalpy of the reaction of hydrogen gas with chlorine gas by the…

A: Volume of the gas = 500mL or 0.500L Pressure = 10atm Temperature = 293.50K Using ideal gas law,  PV…

Q: in to a cylinder, where a chemical reaction turns them in to gaseous products. The cylinder has a…

A: As, heat is flow out from the system = - 398 KJ {Negative sign implies the amount of heat released…

Q: piece of metal weighing 49.047 g was heated to 100.0 ºC and then put it into 100.0 mL of water…

A: Given that:  Mass of metal (m)= 49.047g  Initial temperature of metal(T1) = 100.0°C Volume of water…

Q: A 124 gram ice cube at -33°C is placed into a 2.50 kg iron container (assume no energy is transfered…

A: The mass of 1 kg is equal to 1000 g. The heat released by the 2.50 kg of iron container is…

Q: One method of generating electricity is by burning coal to heat water, which produces steam that…

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Q: A 382−g aluminum engine part at an initial temperature of 18.76C absorbs 97.3 kJ of heat. What is…

A: This problem can be solved by using the equation :                                    q=mc∆Twhere q…

Q: When the combustion equation for butane is balanced using integer coefficients, the ΔH for the…

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Q: Many barbeque grills use propane gas, C3H8(g) as a fuel source. Using standard enthalpies of…

A: The balanced chemical equation for the combustion of propane can be written as follows: C3H8 (g) +…