Expressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J J kJ kcal 558       150.       0.739 Fill in blanks of the table.

Q: Let us assume that a car completely burns its fuel to carbon dioxide and water. Let us further…

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Q: A 6.57 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

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Q: A student wishes to determine the heat capacity of a coffee-cup calorimeter. After mixing 125 g of…

A: Answer:- This question is answered by using the simple concept of calorimetry which states that heat…

Q: Use the given information to determine the enthalpy of the reaction 2 M(s) + 3 Cl,(g) – 2 MCI, (s)

A: Step : 1             Find the enthalpy of the reaction.

Q: A 0.500-g sample of KCl is added to 50.0 g of water in a calorimeter (as shown). If the temperature…

A: In case of a calorimeter we can relate the heat change of a system to the product of the mass of the…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.65 kg sample…

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Q: 23. Use the following information to determine the enthalpy for the reaction shown below. CS2(1) +…

A: C(graphite) + 2S(s) → CS2(l)                        Formation of CS2(l)= ∆H∘(CS2)= 87.9 kJ    CS2(l)…

Q: Calcium carbide, CaC2, is manufactured by the reaction of Cao with carbon at a high temperature.…

A: The question is based on the concept of chemical thermodynamics. We have  to identify the type of…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6HCl(aq) • 2 MCl, (aq) + 3…

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Q: Which is the correct formation reaction for KCI? OK(s) + 12 Cl₂(s) ----> KCI(s) OK(aq) + 2Cl₂(g)…

A: A question based on stoichiometry that is to be accomplished.

Q: C2H4 (g) + H2O (l) → C2H5OH (l) ΔH=? 1.C2H5OH (l) + 3O2 (g) → 2CO2 (g) + 3H2O (l) ΔH = -1367,5 KJ…

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Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.53 kg sample…

A: We know that  Q = m*s*ΔT        ----------(1) Where, Q is heat energy               m is mass of…

Q: During photosynthesis, plants use energy from sunlight to form glucose and oxygen from carbon…

A: 1- In this question, we want to calculate the mass of CO2 in grams unit.  You can see whole…

Q: A teaspoon of the carbohydrate sucrose (common sugar) contains 16 Calories (16 kcal). What is the…

A: Given: As interpreted by the question, we have been given a teaspoon of the carbohydrate sucrose…

Q: The change in enthalpy (heat of solution) for ammonium nitrate dissolving in water is 25.7 kJ/mol.…

A: Molar mass of ammonium nitrate =80.043g/mol

Q: Expressing amounts of energy in different energy units is necessary to solve many chemistry…

A: Given-> 1 calorie = 4.184 J 1 kcal =1000 cal

Q: Determine if the following reactions/processes are endothermic or exothermic. A+B → AB ΔΗ AH-75 kJ A…

A: Exothermic reactions release energy into their surroundings, while endothermic reactions absorb…

Q: When a sample of Mg is combusted in a bomb calorimeter, 25.4 kJ of energy as heat is evolved. The…

A: Assuming the final temperature of water and bomb calorimeter in equilibrium is T. Hence the change…

Q: When a 4.25 g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee- cup…

A: 1) Since the temperature of the water in coffee-cup calorimeter is decreasing from 22 to 16.9 oC…

Q: Silane, SiH4, burns according to the reaction, SiH4 + 2O2 → SiO2 + 2H2O, with ΔH° = –1429 kJ. How…

A: To solve this problem we will use the given thermochemical equation .

Q: A 150.0 mL sample of 0.250 M NaOH is mixed with a 100.0 mL sample of 0.289 M HNO3 in a coffee cup…

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Q: For the reaction below, AH = -879.6 kJ. 3 N₂O(g) + 2 NH3(g) →→→ 4 N₂(g) + 3 H₂O(g) Given that AH =…

A: 1. The standard enthalpy of the reaction is referred to as all the reactants and products of the…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 1.25 kg sample…

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Q: A 4.77 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

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Q: 20 g of chocolate was combusted completely in a calorimeter with 100 mL of water inside. The…

A: Given data is Mass of chocolate combusted = 20 g Volume of water  in a calorimeter = 100 mL  The…

Q: A coffee cup calorimeter, including that water it contains, has a heat capacity of 425 J/K, and is…

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Q: An unknown sample of coal is burned in an apparatus with a calorimeter constant of 1.09 kJ/°C. When…

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Q: 2 CH3OH) +3 O2(g) → 2 CO2) + 4 H20) + 347 kcal Calculate the amount of heat in kcal & kJ released…

A: Given : The reaction equation is as follows. 2CH3OH(l) + 3O2(g) → 2CO2(g) + 4H2O(l) + 347 kcal Mass…

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCI(aq) → 2 MCI, (aq) +…

A: In-order to find the enthalpy change of the desired reaction, the given reactions has to be written.

Q: A chemist measures the enthalpy change (delta)H during the following reaction. Use this information…

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

A: `Given the reaction: H2(g) + Cl2(g) → 2HCl(g) ∆H = -184.6 kJ We have to calculate the mass of…

Q: Question #2: The following mathematical statement is critical to the uce of calorimotry and ie a…

A: Given: The equation used in calorimetry is given as,

Q: Consider these reactions, where M represents a generic metal. 1. 2 M(s) + 6 HCI(aq) 2 MCI, (aq) + 3…

A: We need to obtain the equation with the unknown enthalpy change from the equations with the known…

Q: Magnesium sulfate is often used in first-aid hot packs, giving off heat when dissolved in water. A…

A: Balance chemical equation is defined as which has equal number of atoms or ions in both sides…

Q: wen the reactions, X(s) + O₂(g) →→→ XO(s) XCO3(s) XO(s) + CO₂(g) at is AH for this reaction? X(s) +…

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Q: Magnesium sulfate is often used in first-aid hot packs, giving off heat when dissolved in water. A…

A: Given  Temperature of coffee-cup calorimeter = 25 0C = 273 + 25 = 298 K = T1  Temperature of added…

Q: The table lists the specific heat values of several substances. An unknown substance has a mass of…

A: Heat energy is given byq = m * C * ΔTwhereq = heat energym = mass of the substanceC = specific heat…

Q: Balance the following equation. Rewrite the chemical equation and include the correct coefficients…

A: Balancing of chemical reaction follows the rule of law of conservation of mass.  that is mass cannot…

Q: A coffee-cup calorimetry experiment was performed to determine the heat of neutralization for the…

A: Enthalpy (heat) of neutralization: The amount of heat released when one mole of hydrogen ions, H +…

Q: Do the follow reactions depict Heat of Formation Reactions? If so, mark the reaction as YES, if it…

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Q: A 6.55 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: The total mass of a solution is the summation of the mass of solute and the mass of solvent. The…

Q: A 1401 kg1401 kg car is traveling down the road at 85.8 km/h.85.8 km/h. While traveling at this rate…

A: The kinetic energy of the vehicle in kilojoules is  ≈ 398 kJ

Q: A serving of Chocobits cereal is 122 g.A 1.00-g sample of the cereal is burned in a bomb calorimeter…

A: The objective of this question is to calculate the energy content of a serving of Chocobits cereal…

Q: Classify the reaction endothermic or exothermic and give the change in enthalpy of the reaction.…

A: Endothermic and Exothermic reaction: Endothermic reaction : In endothermic reaction the heat energy…

Q: Which of the following represents an endothermic reaction? H2(g) + F2(g) –→ 2 HF(g) AH= -542 kJ C(s)…

A: The question is based on the concept of chemical thermodynamics. we have to identify the endothermic…