How many moles of C3H (propane) must be reacted according to the following balanced chemical reaction to transfer -349.4 kJ of heat? C3H8(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) ΔΗ = -2219 | KJ

Q: The overall reaction in a commercial heat pack can be repre- sented as 4Fe(s) + 30₂(g) →→→→2Fe₂O3(s)…

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Q: The thermochemical equation for the combustion of methanol is CH3OH (g)  +  3/2 O2(g)  →  CO2(g)  +…

A: Here we are required to find the heat produced on burning 5 gm of methanol

Q: 3. When 0.050 mol of HCl is reactd with 0.050 mol of NaOH in 50.0 mL of water, the temperature of…

A: The heat of a system can be given as :

Q: Consider these reactions: Reaction 1: H2 (g) + Cl2 (g) → 2HC1(g) AH = -184.6 kJ Reaction 2: 20F2 (g)…

A: -> If ∆H =+ve => reaction is endothermic reaction. -> if ∆H = -ve => reaction is…

Q: 2 C4H10(g) + 13 O2(g) --> 8 CO2(g) + 10 H2O(l) change in H = -5756.84 kJ The enthalpy change during…

A: The objective of the question is to find out the mass of CO2 produced in a reaction with a given…

Q: Given these reactions, X(s)+1/2O2(g)⟶XO(s)                 Δ?=−887.7kJ/mol XCO3(s)⟶XO(s)+CO2(g)…

A: X(s)+1/2O2(g)    ⟶    XO(s)                                          ΔH1=−887.7kJ/mol…

Q: Elemental iron is used in heat packs and the reaction can be represented as: 4 Fe(s) +3 O2(g) → 2…

A: When enthalpy is negative that means reaction is exothermic reaction

Q: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s), ΔH = -1652 kJ (c) How much heat is released when 1.21 g iron is…

A: Given -  Heat released in the given reaction = 1652 kJ Mass of iron = 1.21 g

Q: Nitromethane (CH3NO2) burns in air to produce significant amounts of heat. 4 CH3NO2(l) + 3…

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Q: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s), ΔH = -1652 kJ (d) How much heat is released when 11.40 g Fe and 2.13…

A: In the given question we have to calculate the heat released during the reaction,  First of all, we…

Q: How much heat is evolved when 453.5 g of ammonia (NH3) is produced according to the following…

A: Given Reaction is - N2 (g) + 3H2 (g) → 2NH3 (g)                  ΔH= -91.8 kJ

Q: You mix 125 mL of 0.220 M CsOH with 50.0 mL of 0.550 M HF in a coffee-cup calorimeter, and the…

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

Q: What mass of iron is produced if 58.2 kJ of heat are released according to the following equation?…

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Q: For the following combustion reaction CH3CH₂CH₂COOH(1) +502(g) → 4CO₂(g) + 4H₂O(g) AH = -2.18 × 10³…

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Q: Propane is a common fuel used in portable stoves. If a gas canister contains 0.283 dm3 of propane,…

A: Given, C3H8 (g) + 5 O2 (g) ➝ 3 CO2 (g) + 4 H2O (g)              ∆H = -2221KJ/mol Here, (-) sign…

Q: Liquid hydrogen peroxide is an oxidizing agent in many rocket fuel mixtures because it releases…

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Q: A balanced, generic thermochemical equation is shown below.  A, B, and C are substances involved in…

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Q: In the following reaction, how much heat is generated when 3.27 moles of CH« are burned? CH: (g) + 2…

A: The reaction is : CH4(g)  +  2O2(g)  →  CO2(g)  +  2H2O(g)       ∆H°=-802 kJ/mol Here, as we can…

Q: heat for the combustion of sucrose (table sugar, C12H22O11) is -5,647 kJ for

A: Number of moles = mass/ molar mass  Number of moles of O2 = mass of O2/molar mass of O2

Q: Nitric oxide (NO) can be formed from nitrogen, hydrogen and oxygen in two steps. In the first step,…

A: The total change in enthalpy for the solution is the sum of all changes regardless of the distinct…

Q: The following thermochemical equation is for the reaction of C(s,graphite) with O2(g) to form…

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Q: How many grams of iron (Fe) are formed when 2.28 x 10^3 kJ of heat evolves from the reaction?…

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Q: Use Reaction 1. Determine the mass, in grams, of chlorine gas consumed (with excess H₂) when 1,479.0…

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Q: A 2.4 kg aluminum engine block heats up to 131.8 °C. Engine coolant at 22.2 °C is added to prevent…

A: By help of Following formula, we can calculate the mass of coolant - M1 C1 ∆T1 = M2 C2 ∆T2 Here, M1…

Q: An unknown metal has a mass of 88.0 g. When 2440 J of Metal Specific heat (J/g • C) heat are added…

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Q: The standard enthalpy changes for the formation of aluminum oxide and iron (III) oxide are 2 Al(s) +…

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Q: When a 8.47 g sample of sodium iodide, NaI, dissolves in 160.0 g of water in a calorimeter, the…

A: Calorimetry is based on the principle that when two substances at different temperatures are kept…

Q: Below is the chemical eq

A: i)            CH4O(l)    +   3/2  O2 (g) ⟶    CO2 (g) +    2 H2O( l)     △H =−726.8  KJ…

Q: piece of metal weighing 45.0 g was heated to 95.0oC, and the hot metal was added to 50.0 g of cold…

A: We know that the heat lost by the metal will be equal with the heat gained by the water.  Thus…

Q: The complete combustion of propane, C 3H 8(g), is represented by the equation:  C 3H 8(g) + 5 O 2(g)…

A: when the heat is evolved in a reaction then that reaction is known as exothermic reaction.  The…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.19 kg sample…

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Q: Use Reaction 2. How much energy (in kJ) is released when 49.0 g of oxygen difluoride decomposes?…

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Q: Industrial production of nitric acid, which is used in many products including fertilizers and…

A: GIVEN, chemical reaction :  4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) mass of NH3 = 7.000 x 103 g

Q: Given the reaction: 4 Fe(s) +302(g) → 2 Fe203(s) A H= -1652 kJ, what is the enthalpy change when…

A: The amount of energy released from the reaction is called the enthalpy of the reaction. When the…

Q: Natural gas burns in air to form carbon dioxide and water, releasing heat. CH4(g) + O2(g) → CO2(g)…

A: Given : Mass ( m ) = 23 gram Temperature (∆T) = 32°C   Find mass of CH4 = ??

Q: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s), ΔH = -1652 kJ (a) How much heat is released when 4.47 mol iron is…

A: Since, The standard enthalpy of the formation is defined as change of enthalpy of 1 mol of the…

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.