Which of the following processes is exothermic? the freezing of water O a chemical reaction that absorbs heat O the sublimation of carbon dioxide O the vaporization of water O warming soup from room temperature to 120°C

Q: A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat…

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Q: The table lists the specific heat capacities of select substances. Substance Specific heat capacity…

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Q: 1. A 32.07 gram sample of vanadium was heated to 75 deg. It was then dumped in which the initial…

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Q: 3. The density of water at 25 °C is 0.997 g/mL and the density of vegetable oil at this temperature…

A: Endothermic process: it is a thermodynamic process where the enthalpy (H) of the system icreases.…

Q: Which is NOT an example of an endothermic change?     melting      sublimation      freezing…

A: In Endothermic process heat is absorbed to perform that process.

Q: A student performs a calorimetry experiment. The student combines 100. g of 0.40 M HC1(aq) with 100.…

A: Heat absorbed by the particular species = mass × heat capacity × temperature change

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

A: Mass of substance = m = 16.3 g Temperature increased by Means change in temperature = ∆T = 12.5°c…

Q: A chemist placed a 1.195 g sample of fuel in a bomb calorimeter which was immersed into 2.00 L of…

A: The mass of the fuel sample is = 1.195 g The increase in the temperature of the water is = 20.1oC to…

Q: A calorimeter holds 50 g water at 29.0°C. A sample of hot iron is added to the water, and the final…

A: The given mass of the water (m) = 50 g The initial temperature of water (T1) = 29.0 °C The final…

Q: A 29.8 g sample of water at 4.7 C is mixed with 52.5 g of water at 74.8 C. Calculate the final…

A: Given data,Mass of water(1)=29.8gTemperature(T1)=4.7oCMass of…

Q: When gasoline burns, it reacts with oxygen in the air and forms hot gases consisting of carbon…

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Q: Given that 154.81 g of solution increased in temperature by 4.82 °C, how much heat, in J, was gained…

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Q: What is the enthalpy change in kJ of a chemical reaction that raises the temperature of 250.0 mL of…

A: We have to calculate the enthalpy change

Q: 22.9 mL of an unknown acid was neutralized by mixing it with 50.3 mL of NaOH in an aqueous solution.…

A: Since the temperature of the solution is increased from 22.0 oC to 35.2 °C, heat is released by the…

Q: When 40 mL of 1.0 M HCl was mixed with 50 mL of 1.5 M NaOH in a coffee cup calorimeter, the…

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Q: The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.134 g sample of NH4Cl is added to…

A: The objective of this question is to determine the minimum temperature reached by the solution.

Q: A 5.71 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Check the temperature of the water after the dissolution and check whether the reaction is…

Q: Which of the reactions are exothermic? 2 Mg(s) + O,(g) → 2 MgO(s) + heat O NH, (g) + HCI(g) →…

A: The reaction that releases heat during the reaction,  is called exothermic reaction.

Q: Substance X was dissolved in a beaker of water, and it was observed that the beaker felt warmer.…

A: Exothermic reaction and endothermic reaction: Exothermic reaction : Exothermic reactions is a…

Q: A reaction is allowed to take place in an insulated container containing 100 mL of water. If the…

A: Answer : As it is an isolated chamber in which the reaction occurs and also it is containing 100 mL…

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.