I Review I Constants I Periodic Table Calculate the kilocalories for each of the following: Part A one cup of popcorn that produces 125 kJ when burned in a calorimeter Express your answer with the appropriate units. Submit Previous Answers Completed; correct answer withheld by instructor Part B a sample of butter that produces 38.3 kJ when burned in a calorimeter Express your answer with the appropriate units. Submit Previous Answers Completed; correct answer withheld by instructor

Q: The following thermochemical equation is for the reaction of N₂ (g) with H₂ (g) to form NH3(g).…

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Q: What is the kinetic energy of a baseball with a mass of 117.7 g traveling at a speed of 1.377 m/s?

A: Given, Mass of a baseball (m) = 117.7 g = 0.1177 kg Speed of a baseball (v) = 1.377 m/s Kinetic…

Q: Mass of can (g) Mass of can and water (g) Initial mass of food sample (g) Final mass c food sample…

A: We can use the given data and required conversion factors for calculations.

Q: study the graph  What is true according to the information in the graph? A) The enthalpy of the…

A: We have to predict the correct option.

Q: What is the difference between an exothermic and an endothermic reaction?

A: An exothermic reaction is a chemical reaction  in which energy is released during the reaction.…

Q: The following thermochemical equation is for the reaction of nitrogen(g) with hydrogen(g) to form…

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

A: 1 calorie = 4.184 Joule  1 J = (1/4.184) cal  1 kJ = 1000 J  1 kJ = 239 cal

Q: A piece of cobalt originally at 90.6°C was placed into a coffee cup calorimeter containing 200.0…

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Q: Heat Evolved (J) 50 45 40 35 30 20 15 10 S Relationship Between Amount of Reactant and Energy ° 10…

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Q: 9. The specific heat capacity of helium gas is 5.300 J/g °C. How many kilojoules of heat are needed…

A: To solve this problem we have to calculate the amount of heat release or need.

Q: How much heat in joules is needed to raise the temperature of 1.0 L of water from 0 Celsius to 100…

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Q: A student heats 84.17 ml. of water to 95.27 "C using a hot plate. The heated water is added to a…

A: Given,Volume of heated water = 84.17 mLVolume of cold water = 73.92 mLTemperature of heated water…

Q: If 115 cal are added to 49.2 g of solid iron, what is the change in temperature of the iron? The…

A: The objective of this question is to calculate the change in temperature (ΔT) of the iron when a…

Q: What is the SI unit of energy? List some other common units of energy.

A: The capacity to do work is called energy.

Q: How much heat, in joules and in calories, must be removed from 2.13 mol of water to lower its…

A: Given information is as follows: The number of moles of water = 2.13 mol The initial temperature…

Q: A sample of gaseous oxygen is heated with an electrical coil. If 171 Joules of energy are added to a…

A: Given : Final temperature of oxygen = 36.6 oC Heat added = 171 J And mass of oxygen = 13.3 g

Q: Quantity Mass of can (g) 12.695 mass of can and water (g) 125.129 Initial mass of food sample (g)…

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Q: A bomb calorimetry, Or device offen of Combustion Content of goods. The Calorimeter temperature -In…

A: The heat of combustion:  The heat of combustion is defined as heat released when a substance is…

Q: Statement A: Heat is absorbed by the surroundings from the system in an exothermic process.…

A: Answer  Statement A Heat is absorbed by the surrounding from the system is…

Q: Two aqueous solutions are both at room temperature and are then mixed in a coffee cup calorimeter.…

A: Endothermic reactions : The reactions in which heat is absorbed are called exothermic reactions.…

Q: An unknown substance has a mass of 25.7 g. The temperature of the substance increases by 19.5…

A: Specific heat of a particular substance is constant. It is calculated as the heat required to raise…

Q: Part A Calorimetry is a method used to measure enthalpy, or heat, changes that occur during chemical…

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Q: The specific heat capacity of lead is 0.13 J/g °C. How much heat (in J) is required to raise the…

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Q: Find the heat change of the reaction. CH4 (g) + 2 Cl2 (g) à CCI4 (g) + 2 H2 (g) Substance AHf…

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Q: Please help me

A: Answer is explained below, hope you like it. Ans:- The enthalpy of dissolution of CuSO4 is -73.75…

Q: How many calories are required to heat 731 g of water from 35.0 C to 83.0 C? (Assume that the…

A: mass=m=731g temperature=T1=35.0 °C temperature=T2=83.0 °C specific heat =c=1.00cal/g °C heat=q=?

Q: A compound is 32.07% carbon by mass. What mass of the compound would contain 45.00g of carbon?…

A: 1 mol is defined as the presence of 6.022 x 1023 entities (atoms, molecules, ions etc.)in a…

Q: The decomposition of hydrogen peroxide to form water and oxygen gas releases 196.6 kJ per mole of…

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Q: The value for A,H" for C,H, (g) is -104.7 kJ/mol. Choose a balanced chemical equation for the…

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Q: The combustion of sucrose (C12H22011) proceeds according to the following reaction. What is the…

A: Energy change of a reaction is represents by ∆H , it is also called enthalpy change.  If energy is…

Q: For a process at constant pressure, 6.20 x 10* calories of heat are released. This quantity of heat…

A: Inorder to convert kilocalorie to joule, multiply the energy value by 4184. So, 1 kcal = 4184 J 1…

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.