Which one of the following processes is exothermic? a. 16 CO2(g) + 18 H2O(l) →2 C8H18(l) + 25 O2(g) b. CO2(s) →CO2(g) c. H2O(g) →H2O(l) d. H2(l) →H2(g) e. H2(g) →2H(g)

Q: a) In the late eighteenth century Priestley prepared ammonia by reacting HNO3(g) with hydrogen gas.…

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Q: A gold ball with a mass of 138 g has been heated to a temperature of 92.4°C and is then dropped into…

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Q: If a 136.51 g Al rod (c = 0.900 J/g°C) is at 100.0°C and placed into 250.0 g of water at 21.8°C,…

A: Option (C) 30°C is the correct choice.

Q: The addition of 107.0  g potassium fluoride to 607.0  mL of water (d = 1.00 g/mL) causes the…

A: Mass of KF = 107.0 grams Volume of water = 607.0 mL Density of water = 1.00 g/mL Mass of KF solution…

Q: a) What is the molar heat capacity of liquid water?   J/mol oC (b) What is the heat capacity of…

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A: Given that: molar mass: 78.11 g/mol cs,solid  = 1.51 J/g*°C cs,liquid  = 1.70 J/g*°C cs,gas  = 1.05…

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Q: A block of copper of unknown mass has an initial temperature of 65.4 °C. The copper is immersed in a…

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Q: Suppose some ice at 0ºC is placed into 50.00g of water at 25.5ºC. When the system reaches…

A: Here we are required to find the heat of fusion of ice Hf

Q: What is ΔH° for the following phase change? NaCl(s) → NaCl(l) Substance ΔH°f (kJ/mol) NaCl(s)…

A: Given NaCl(s) → NaCl(l)Substance          ΔH°f (kJ/mol)NaCl(s)               –411.12NaCl(l)…

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Q: If a 136.51 g Al rod (c = 0.900 J/g°C) is at 100.0°C and placed into 250.0 g of water at 21.8°C,…

A: Answer: (D) 30°C

Q: The reaction between iron(III) oxide and aluminum, to produce aluminum oxide and iron, has a heat of…

A: The chemical reaction is given by,                                       2 Al(s) + Fe2O3(s) → 2…

Q: What is the value of the enthalpy of formation of lithium chloride solid?

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Q: Which of the following processes are exothermic?N2 (g) → 2N (g)H2O (l) → H2O (s)Cl2 (g) → 2Cl (g)2H2…

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Q: If a 136.51 g Al rod (c = 0.900 J/g°C) is at 100.0°C and placed into 250.0 g of water at 21.8°C,…

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Q: Use Hess’s Law to determineDH for the reaction     C3H4 (g)  +  2 H2 (g) ®  C3H8 (g),  given that…

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Q: Using the thermodynamic information: 1/2 N2(g) + 1/2 02(g)--> N0(g) delta H degrees = 90.4 kJ/mol…

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Q: When 56.8 g of lead reacts with 3.50 L of oxygen gas, measured at 1.00 atm and 25.0°C, 60.1 kJ of…

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Q: Hess's Law. Determine the ΔH0 for the overall reaction based on the three-step thermochemical…

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Q: Use Hess's law to calculate ΔG°rxn using the following information.             CO(g) →  C(s) + 1/2…

A: Record the given data, CO2(g) → C(s) + O2(g)              ΔG°rxn = +394.4 kJ CO(g) + 1/2 O2(g) →…

Q: If a 136.51 g Al rod (c = 0.900 J/g°C) is at 100.0°C and placed into 250.0 g of water at 21.8°C,…

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Q: Is the following process exothermic or endothermic?   2H(g) ⟶⟶ H2(g)

A: When energy is released in a reaction, this reaction is known as exothermic reaction. While, When…

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Q: Energy Constants for H2O 334 J/g = Heat of Fusion (Hf) 2260 J/g = Heat of Vaporization (Hv) 2.11…

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Q: i. Fe (s) + 3 HCl (aq) → FeCl3 (aq) + 3/2 H2 (g) ii. Fe2O3 (s) + 6 HCl (aq) → 2 FeCl3 (aq) + 3 H2O…

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Q: Calculate the standard heat of formation of carbon disulfide (CS 2) from its elements, C(s) + 2 S(s)…

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Q: N2(g)2NO(g)++O2(g)O2(g)2N2O(g)→→→2NO(g),2NO2(g),2N2(g)+O2(g),ΔH=+180.7kJΔH=−113.1kJΔH=−163.2kJ use…

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Q: most energy? Cl2(g) ⟶⟶ 2Cl(g) Br2(g) ⟶⟶ 2Br(g) I2(g) ⟶⟶ 2I(g) 2I(g) ⟶⟶ I2(g) 2Br(g) ⟶⟶ Br2(g)…

A: * Energy  is release when new bond form .while energy  absorb when bond break down.

Q: If a cube of ice at 0°C is placed outside on a warm summer day, the ice will melt spontaneously.…

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Q: hot (158°F) of metal has a mass of 250 g and a specific heat of 0.25 cal/g·C°. John drops the metal…

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Q: A metal sample weighing 43.5 g at a temperature of 100.0 °C was placed in 39.9 g of water in a…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: The addition of 105.0  g potassium fluoride to 599.0  mL of water (d = 1.00 g/mL) causes the…

A: Given, Mass of potassium fluoride = 105.0g. Volume of water = 599.0mL. Density of water = 1.00g/mL.…

Q: 8.96 g of MgSO₄ is placed into 100.0 mL of water. The water's temperature increases by 6.70°C.…

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Q: Part A. In the late eighteenth century Priestley prepared ammonia by reacting HNO3(g) with hydrogen…

A: HNO3(g) + 4H2(g) → NH3(g) + 3H2O(g) ΔH = –637 kJ From this data we get that , When 4 mole Hydrogen…

Q: Consider the following data. N2(g) + O2(g)  2 NO(g)   H = +180.7 kJ 2 NO(g) + O2(g)  2 NO2(g)…

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Q: In an experiment, 9.80 g of olive oil at 80.0 degrees celisus are quickly transferred to water in a…

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