Consider the reaction   2H2+O2⟶2H2OΔ?rxn=−484 kJ Which answer best describes the transfer of heat that occurs when 1.40 mol H2 reacts?   678 kJ absorbed 484 kJ released 339 kJ released 678 kJ released 484 kJ absorbed 339 kJ absorbed

Q: Consider the chemical equation 2 A + 3 B ---> 4 C + D The reaction enthalpy is 705 kJ How many…

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Q: 211 values from your textbook. TOP the reaction shown below using standard heat of formation Fe(s) +…

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Q: Consider the reaction. 2 H, + 0, → 2 H,0 AHrxn = -484 kJ Which answer best describes the transfer of…

A: Heat released during reaction can be calculated based on limiting agent.   For finding the limiting…

Q: 170 mL of 0.25 M HNO3 are mixed with 125 mL of 0.30 M KOH in a calorimeter. If the solutions have an…

A: Volume of HNO3 = 170 mL Molarity of HNO3 = 0.25 M Volume of KOH = 125 mL Molarity of KOH = 0.30 M…

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: 8. The overall reaction in commercial heat packs can be represented as   How much heat is released…

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Q: e the information to answer the following questions. This reaction is... Suppose 41.0 g of NH3…

A: The given data: 2NH3(g) ==> N2(g) + 3H2(g)∆H° = 160 KJ When ∆H° is positive,  it means heat is…

Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: In an exothermic reaction, heat is released, and in an endothermic reaction, heat is absorbed.

Q: Consider the balanced reaction 4 A+5 B →3 C+4 D and the enthalpies of formation provided in the…

A: Given  Compound       ∆Hf   ( KJ/mole )      A                   56.4       B                 -399.9…

Q: רPi How much heat will be released (AH) if 0.2037 mol of NH3 are mixed with 0.20 mol of O2 in the…

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Q: The reaction 3H2(g) + N2(g) → 2NH3(g) has an enthalpy of reaction of -92.6 kJ/mol. If 2 g of…

A: According to the given balanced chemical equation, one mole of nitrogen reacts to produce 92.6 kJ of…

Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: The objective of the question is to determine the type of reaction (endothermic or exothermic) and…

Q: Calculate how much heat is absorbed when 100. Grams of N is mixed with 75 grams of O2. N2(g) + O2(g)…

A: First of all, calculate the no. of moles of each reactant given and then find out which one is…

Q: 5. A student combines 20.00 mL of 0.500 M HCI and 20.00 mL of 0.550 M NaOH in a calorimeter. The…

A: Recall the following expression according to Law of calorimetry…

Q: The experimental ?H is -213 kcal/mol. How much heat is released during the combustion of 45.3 grams…

A: We have to find the heat released

Q: if 11.2 g of H2 (g) (MM = 2.016 g/mol) were to react according to the balanced equation given below,…

A: We have to calculate the heat released amount.

Q: fy the reaction endothermic or exothermic and give the cha on. (s) + 2 Fe (s) + 645 kJ → 2 Al (s) +…

A: As heat is added to reaction,  so it is endothermic reaction.

Q: We allow 73 g of oxygen to react with 85 g of ethane.  The reaction is shown below.  Since the heat…

A: Given - Balanced thermodynamical Reaction -  C2H6 (g) + 7/2 O2 (g) → 2 CO2 (g) + 3 H2O (g) ,…

Q: In the following reaction, what is the quantity of heat (in kJ) released when 1.81 moles of CH4 are…

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Q: A chemist measures the energy change AH during the following reaction: 2 H₂O(l) → 2 H₂(g) + O₂(g)…

A: In this question we have identify the given reaction is endothermic or exothermic and calculate the…

Q: In the following reaction, how much heat is generated when 3.21moles of CH4 are burned

A: The negative sign before ∆H0 shows that heat is released from the reaction. Observing the given…

Q: What is the change in internal energy for a system that performs 213 kJ of work on its surroundings…

A: Given, System performs 213 KJ of work on its surrounding And system loses 79 KJ of heat in the…

Q: What quantity of heat (in kJ) will be released if 1.20 mol of SrO is mixed with 0.951 mol of CO₂ in…

A: From balanced reaction one mole of SrO react with one mole of carbon dioxide

Q: A chemist measures the energy change AH during the following reaction: 2 NH3(g) → N₂(g) + 3H₂(g) ΔΗ=…

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Q: Hydrazine, N2H4, is a liquid used as a rocket fuel. It reacts with oxygen to yield  nitrogen gas and…

A: Molar mass of hydrazine (N2H4) = 32.045 g/mol

Q: A chemist measures the energy change AH during the following reaction: 2 HgO(s) → 2 Hg(1) + O₂(g)…

A: The definition of an exothermic reaction is one in which the system (where the reaction is taking…

Q: A chemist measures the energy change AH during the following reaction: Cl₂(g)+H₂(g) → 2 HCl(g) ΔΗ=…

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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: 2. Mercury (II) oxide is a reddish mineral that is used as the cathode in mercury batteries. It is…

A: In the above question the heat energy require to prepare 2 mole Hg have given . We have to calculate…

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 chemist measures the energy change AH during the following reaction: Cl₂(g) + H₂(g) → 2 HCl(g) Use…

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Q: How many grams of NH3 are used when 798 kJ is released? AH = -90.0 kJ/mol CaCO3 + 2 NH3 → Ca(CN)2 +…

A: The problem is asking us to find out how many grams of NH3 are used when 798 kJ of energy is…

Q: Consider the reaction.   2Fe2O3⟶4Fe+3O2.    Δ?∘rxn=+824.2 kJ   The formation of 12.0 g of O2…

A: 2Fe2O3 ——> 4Fe + 3O2          Heat = +824.2 kJ Clearly,  this heat is released when 3 moles of O2…

Q: 22) For the reaction below, AHTX =-126 kJ/mol. How much heat is released when 2.00 mol of NaOH is…

A: Amount of heat released can be calculated by using balanced chemical equation.

Q: The heat of reaction for the reaction A + 2B → 2C is 900. kJ. The heat of reaction for the reaction…

A: For reaction :  A → 2D

Q: In the following reaction, what is the quantity of heat (in kJ) released when 3.91 moles of CH4 are…

A: One mole of methane react with oxygen and produced carbon dioxide and two mole of water