A 27.7 g sample of ethylene glycol, car radiator coolant,loses 688 J of heat. What is the initial temperature of the ethylene glycol if the finaltemperature is 32.5 °C (specific heat, c, of ethylene glycol = 2.42 J/g.K?)

Q: The heat of formation of Fe2O3(s) is -826.0 kJ/mol. Calculate the heat of the reaction 4Fe(s) +…

A: Given information,

Q: 3. When 0.050 mol of HCl is reactd with 0.050 mol of NaOH in 50.0 mL of water, the temperature of…

A: The heat of a system can be given as :

Q: Charcoal is primarily carbon. Determine the mass of CO, produced by burning enough carbon (in the…

A: Charcoal burns in the air and reacts with O2 to produce CO gas, which further burns with more O2 to…

Q: A quantity of 505 J of heat are added to 11.3 g of water at 28.3 °C. What is the final temperature…

A: According to the answering guidelines, I'm posting the solution for the first question. Kindly post…

Q: The specific heat of water is 4.18 J/g-K. AHsolution = -72.8 thermometer When a 9.15-g sample of…

A: To find the heat of the solution per mol, first, we need to find out q for water and then divide…

Q: What is the specific heat of tin if a 55.0-g sample absorbs 982 J of heat to raise its temperature…

A:

Q: If the energy change for a system is equal to the mass of the substance x the change in temperature…

A: Specific heat is the amount of heat needed for one gram of a substance to increase its temperature…

Q: If 50.0g of benzene, C6H6, at 25.0c absorbs 2.71kJ of energy in the form of heat, what is the final…

A: The mass of benzene is = 50.0 g The initial temperature of benzene is = 25oC The amount of heat…

Q: In the following reaction, what is the quantity of heat (in kJ) released when 3.91 moles of CH4 are…

A: One mole of methane react with oxygen and produced carbon dioxide and two mole of water

Q: How much thermal energy (in joules) is required to heat 18.1 g of a metal (specific heat = 0.397 J/g…

A:

Q: The enthalpy change when a strong acid is neutralized by strong base is -56.1 kJ/mol. If 25.0 mL of…

A: HBr + NaOH → NaBr + H2O    First calculate the millimoles of each reactant to find the limiting…

Q: A 50.8 g sample of an unknown metal was heated to 700.0 ˚C then placed into 100.0 g of water…

A: Given,mass of metal = 50.8 oCInitial temperature of metal = 700.0 oCFinal temperature = 78.3 oCmass…

Q: A piece of unknown substance weighs 44.7 g and requires 2110 J to increase its temperature from 23.2…

A: Specific heat: Specific heat can be defined as quantity of heat required to raise the temperature of…

Q: What is the heat of a reaction, in joules, with a total reaction mixture volume of 67.3 mL if the…

A:

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.