A 3.00 g sample of food was burned in a bomb calorimeter. The temperature of 1 kg of water was raised from 25.0 to 36.4°C. Calculate the fuel value of the food sample in kcal/g. Specific heat of water is 1.00 cal/g °C

Q: A serving size of six cookies contains 6 g of fat, 23 g of carbohydrates, and 9 g of protein. If…

A: The ability to do work is called energy and people know how to convert energy from one form to…

Q: A 4.79 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A: Calorimetry is the easiest way to calculate the amount of heat transfer to a substance or from a…

Q: A 1.3-g sample of rice is placed in a calorimeter. When the sample is burned, 22.00 kJ is given off.…

A: Given: The Heat is given off when rice is placed in the calorimeter = 22.00 kJ The mass of the…

Q: Two amounts of 50.0 g of water, at 13.0 and 55.0 °C, respectively, were mixed inside a cup. If the…

A: heat capacity = m C ΔT m = 50 g C = 4.18 J/g c ΔT = 55-13 = 42 c

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: Given,  The change in enthalpy (heat of solution) for ammonium nitrate dissolving in water is 25.7…

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: A constant pressure (or coffee cup calorimeter) contains 125g of water at a temperature of 24.2°C.…

A: Given , mass of water = 125 ginitial temperature, Ti=24.2°Cmass of KBr added = 10.5 gFinal…

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: lacmillan Learning Carbohydrates serve as a vital source of chemical energy to the human body.…

A: 1 KJ = 0.239 Kcal  So  119 KJ = 119 X 0.239 Kcal             =  28.44 Kcal

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: To measure the caloric content of a new breakfast bar, you burn a 2.00 g sample in a calibrated bomb…

A: Given : Mass of breakfast bar = 2.00 g                             Heat capacity of calorimeter =…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 198.0 mg sample…

A: Each chemical reaction is associated with the liberation or intake of a certain quantity of heat.…

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: 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: 5.04 x 10-3 mole of a compound is added to 41.0 g of water in a styrofoam cup and stirred until it…

A: Given,Mass of water = 41.0g.Temperature change = 23.4600C – 23.4200C…

Q: A 8.17 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee…

A:

Q: In winemaking, microorganisms break down the sugar in grapes into ethanol (grain alcohol) and carbon…

A: The molar mass of ethanol = 46 g  2 moles of ethanol , which weights 92.16 g produces 16.6 kcal  of…

Q: A serving size of four cookies contains 7 g of fat, 16 g of carbohydrates, and 5 g of protein. If…

A: A gram of fat has about 8  kilocalories  so 7 gm of fat is equivalent of 8*7=56 kilocalories =…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 161.0 g sample…

A: A chemist carefully measures the amount of heat needed to raise the temperature of a 161.0 g sample…

Q: A calorimeter contained 75.0 g of water at 16.95 °C. A 93.3 g sample of iron at 65.58°C was placed…

A: Specific heat capacity is equal to the heat of 1g of substance  required to raise the temperature by…

Q: If 4210 J of heat is added to a calorimeter containing 254 g of water, the temperature of the water…

A:

Q: Commercial cold packs consist of solid ammonium nitrate and water. NH4NO3 absorbs 25.69 kJ of heat…

A: Given that: Mass of ammonium nitrate = 3.40 gMass of water = 100 gInitial temperature of solution =…

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…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A 0.2500g sample of a pretzel is burned. The heat it gives off is used to heat 50.00g of water from…

A: The amount of heat liberated can be calculated as follows-

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:

Q: A serving size of eight cookies contains 7 g of fat, 17 g of carbohydrates, and 8 g of protein. If…

A:

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 794.0 g sample…

A:

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.61 kg sample…

A: We have to calculate the specific heat.

Q: 2. A piece of Cu metal is heated in a test until the temperature reaches 96 °C and dropped into a…

A: 2. A piece of hot Cu metal at 96 °C is dropped into a calorimeter, containing 50 mL of water at 27…

Q: Vanillin is a natural constituent of vanilla that is also manufactured for use in artificial vanilla…

A: Given the mass of vanillin taken for combustion = 1.013 g Since the temperature of the calorimeter…

Q: For the reaction: 2 C020) + 4 H20w + 347 kcal O 2(g) -> 2 CH30H) +3 0, Calculate the amount of heat…

A: When methanol reacts with oxygen or burns with oxygen releases a lot of energy and gives water and…

Q: 1. A thermometer placed in a solution undergoing a chemical reaction indicates an increase in…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In order to break water into hydrogen and oxygen, water is heated to more than 500°C. Which kind of…

A: We have to predict the kind of reaction and reason.

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.