(What is meant by "enthalpy" change of + 124KJ 2 How would the following changes affect the numerical value of K, of the system? increase in pressure at constant temperature

Q: For the chemical reaction Ca (s) + ½ O₂ (g) → CaO (s) ∆H° = -635 kJ/mol. What is the molar enthalpy…

A: The balanced Chemical equation given in the question - Ca(s) + ½O₂(g) → CaO(s), ∆H° =-635 kJ/mol…

Q: by Leamin When a 6.00 g sample of RbBr is dissolved in water in a calorimeter that has a total heat…

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Q: The standard enthalpy change for this reaction is -36.3 kJ/mol at 298 K. 1/2 H2(g) + 1/2…

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Q: 2. A 1.07 g sample of sulfur was burned in a bomb calorimeter with calorimeter constant of 2.03…

A: Mass of sulfur sample = m = 1.07 g Calorimeter constant = C = 2.03 Kcal/°C Temperature change = ∆T =…

Q: The standard enthalpy change for the following reaction is 2.14x10³ kJ at 298 K. UF6(s) U(s) + 3…

A: Given : reaction And ∆Hrxn = 2.14 × 103 KJ

Q: When a 6.00 g6.00 g sample of KSCNKSCN is dissolved in water in a calorimeter that has a total heat…

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Q: If 41,200 J of energy is required to raise the temperature of 120.0 g of a liquid by +73.4 °C, what…

A: In this question, we will determine the specific heat of the Solution.  You can see details step by…

Q: Calculate the value of q (kJ) in this exothermic reaction

A: Number of moles = mass/molar mass  Molar mass of H2O2 = 34.0147 g/mol

Q: 5.2 b Calculate the magnitude of q for a system that does 7.05 × 105 kJ of work on its surroundings…

A: From given data W = -7.05×105 kJ ∆U = -9.55×103 kJ W is negative because work is done by system on…

Q: When a 7.00 g sample of KCN is dissolved in water in a calorimeter that has a total heat capacity of…

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Q: Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction:…

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Q: When a 4.00 g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity…

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Q: Given the standard reaction enthalpies for these two reactions: (1) N2(g) + 202(g)2NO2(g) A,H° =…

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Q: Calculate the standard enthalpy change for the reaction: 2C3H18(1) + 1702(g) ® 16CO(g) + 18H,O(1)…

A: When a thermochemical equation is reversed then its ∆H value chages its sign. When a thermochemical…

Q: The standard enthalpy change for the following reaction is 1.11x10 kJ at 298 K. 2 BaO(s) 2 Ba(s) +…

A: By Hess's law of constant heat summation: Equation (ii) = -1/2 x equation (i) ∆H2° = -12×∆H1° ∆H2°…

Q: A sample of 17.1 g of solid with molar mass 71.9 g/mol is dissolved in 331 g of water initially at…

A: Indroduction : Heat is lost due to the dissolution of the salt in the water . So the enthalpy change…

Q: what is the change in the enthalpy in kj/kg for the complete combustion of 39.0 g of fructose,…

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Q: When a 3.00 g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of…

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Q: Given the standard reaction enthalpies for these two reactions: (1) N2(g) + 20,(g) →N2O4(g) A,H° =…

A: Given  N2(g) +  2O2(g)   →  N2O4(g)                ∆rH°  =  9.2 KJ/mol                 [ Equation 1…

Q: 5.2 c  The diagram on the far left in the row showsa system before a process. Which of thediagrams…

A: According to first law of thermodynamics, the internal energy change of the system is equal to the…

Q: The standard enthalpy change for the following reaction is 1.08×103 kJ at 298 K.UO2(s) U(s) +…

A: Given that, a chemical reaction is UO2(s) → U(s) + O2(g). Also, the standard enthalpy change for the…

Q: Assuming ideal gases reactants and products. Estimate the enthalpy of reaction hR for the combustion…

A: The enthalpy of vaporization of water is defined as the amount of heat energy required to vaporize a…

Q: The standard enthalpy change for the following reaction is 52.3 kJ at 298 K. 2 C(s,graphite) + 2…

A: The enthalpy shift that happens in a system when a chemical reaction changes one mole of matter…

Q: When a 2.00 g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity…

A: The molar heat is the quantity of heat required by one mole of a substance to raise its temperature…

Q: If 0.315 moles of hexane (C6H14) are burned in a bomb calorimeter containing 5.65 liters of water,…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of 1 kg…

Q: Calculate the standard enthalpy for the combustion of liquid octane, based upon the balanced…

A: Calculate the standard enthalpy of combustion of octane ?

Q: is this the standard enthalpy change, enthalpy change, enthalpy of solution, or the standard molar…

A: Given reaction:-  CH3OCH3(l) + 3O2(g) ------> 2CO2(g) +3H2O(l) The above reaction is the…

Q: How much work, w, must be done on a system to decrease its volume from 12.0 L to 3.0 L by exerting a…

A: w = P . ∆V P = 3.0 atm and ∆V = 12.0 - 3.0 = 9.0 L w = 3.0 x 9.0     = 27.00 L. atm

Q: How much work, w, must be done on a system to decrease its volume from 11.0 L to 3.0L by exerting a…

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Q: The standard enthalpy of neutralization of a weak hydrogen cyanide acid, HCN (aq), by a stong base,…

A: The quantity of energy that is evolved by a gaseous atom which is isolated and needs to lose an e-…

Q: Calculate AH (in kJ/mol NH,NO3) for the solution process NH,NO3 (s) → NH; (aq) + NO, (ag) Assume…

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Q: A system absorbs 1.66E2 kJ of heat and the surroundings do 1.032E2 kJ of work on the system. What is…

A: We have to predict the change in internal energy of system.

Q: During an experiment where 50.0 mL of a 1.0 M acid solution was mixed with 50.0 mL of a 1.0  M base…

A: Given,  The ∆Hrxn is : when 50.0 mL of a 1.0 M acid solution was mixed with 50.0 mL of a 1.0 M base…

Q: The standard enthalpy of reaction, AH rxn: for the reaction, CaO(s) + SO3(g) –→ CaSO4(s) is -401.5…

A: Ans.           ∆H°=Erxn°+∆nRT    or     Erxn° = ∆H°-∆nRT…

Q: 3. What mass of aluminum metal would absorb 250.0 ķJ when it melted at its melting point? The molar…

A: Heat absorb by Al is given and molar enthalpy of fusion for aluminium is also given so apply formula…

Q: What is the connection between Hess's law and the fact that enthalphy is a state function?

A: Chemical thermodynamics is branch of chemistry in which we deal amount of heat evolved or absorbed…

Q: In an experiment, 5.30 g of lithium chloride is dissolved in 100 cm3 of water to give 105.3 g of…

A: To calculate the molar enthalpy of solution, heat absorbed by the water should be calculated.

Q: 1. Calculate the standard enthalpy change when gaseous dinitrogen tetroxide (N2O4) reacts with…

A: ∆fH°(N2O4) = 9.66 KJ/mol ∆fH°(H2O) = -241.82 KJ/ mol ∆fH° ( H2) = 0 ∆fH° ( N2) = 0

Q: Using the equations Ca(s) + 1/2 O, (g) → CaO (s) AH° = -450 kJ/mol CO, (g) → C (s) + O, (g) AH° =…

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Q: When a 8.00 g8.00 g sample of RbBrRbBr is dissolved in water in a calorimeter that has a total heat…

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Q: When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0M NaOH at 25 °C in a calorimeter, the…

A: Given that 25.0 mL of 1.0 M of H2SO4 is added with 50 mL of 1.0 M of NaOH solution at 25°C Recall…

Q: 7. Calculate the standard enthalpy change at 25°C for the reaction CH, (g) + 2 H₂S (g) →→ CS₂ (1) +…

A: The standard enthalpy of reaction is the change in enthalpy of a reaction under standard conditions.…

Q: The standard enthalpy of reaction, AH for the reaction, CaO(s) + SO3(3) – CaSO,(s) is 401.5 kJ mol1.…

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Q: Under what conditions does q, the heat evolved or absorbed by the system in a physical or chemical…

A: The correct answer is given below

Q: When a reaction occurs in a calorimeter, the temperature of 60 g of a reaction mixture increased by…

A: Given that : Mass of mixture (m) = 60 g Change in temperature (∆T) = 5°C Specific heat capacity (s)…

Q: A system absorbs 1.54E2 kJ of heat and the surroundings do 1.118E2 kJ of work on the system. What is…

A: 2.618E2 = 2.618 * 10^2 kJ

Q: Using the provided table, determine the enthalpy for the reaction 2 K(s) + 2 H,O(1) → 2 KOH (aq)…

A: The chemical reaction is:2 K (s)+ 2H2O (l) → 2KOH (aq)+H2 (g)         ∆HrGiven: ∆Hf° {K (s)} = 0∆Hf°…

Q: 1) When 120 mg of naphthalene, C1oHae), was burned in a bomb calorimeter the temperature rose by…

A: Standard heat of combustion of Naphthalene = - 5156.1 kJ/mol Standard heat of combustion of Phenol =…