Estimate the mass of water that must evaporate from the skin to cool the body by 1.30 °C. Assume a body mass of 88.0 kg and assume that the specific heat capacity of the body is 4.00 J/g.°C.

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A:

Q: A certain chemical reaction releases 111.kJ of heat energy per mole of reactant consumed. Suppose…

A: Heat capacity of calorimeter: Ccal = 4.45 J / 1oC = 4.45 J/oC   Heat of calorimeter: q cal  = C cal…

Q: A 1.819 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A:

Q: The molar heat of solution of a substance is found to be +21.38 kJ/mol. The addition of 0.100 mol of…

A: Given information: Moles = 0.100 mol Molar heat of solution = +21.38 kJ/mol Temperature = 40.0 °C

Q: The heat capacity of a calorimeter is calibrated by adding 3.00 mL of water at 40.0°C to the…

A: Heat is released by water at a higher temperature and absorbed by water at a lower temperature.…

Q: A 2.739 g sample of a new organic material is combusted in a bomb calorimeter. The temperature of…

A:

Q: A 3.96 g sample of carbon is introduced into the combustion chamber of a calorimeter containing…

A: A numerical problem based on heat released, which is to be accomplished.

Q: Adding 5.00 g of to 140 g of water in a coffee-cup calorimeter (with stirring to dissolve the salt)…

A: The enthalpy change ΔH is the heat of solution (qrxn) per mole of solute (n). i.e.…

Q: 58.2 g sample of Sn metal at 91.1°C was dropped into 70.4 g of H2O at 20.7°C, and after the…

A: We will use calorimetry principle

Q: Isooctane is a primary component of gasoline and gives gasoline its octane rating. Burning isooctane…

A: Heat released = 330 KJ Initial temperature = 23.2℃ Final temperature = 66.5 ℃

Q: An experiment was performed to calculate the heat of solution for potassium fluoride. Use the…

A: Given: The mass of water=52.42 g The mass of salt sample=7.32 g The total mass of the sample,…

Q: To treat a burn on his hand, a person decides to place an ice cube on the burned skin. The mass of…

A: Please find your solution below : Thermochemistry is a branch of chemistry in which we measure the…

Q: A 1.75 g sample of zinc metal is reacted with 128 g of 1.10 M hydrochloric acid solution in a…

A: Answer:The law of conservation of energy states that energy cannot be created nor destroyed. It can…

Q: When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution…

A: Coffee cup calorimeter: It is calorimeter device used to identify heat and enthalpy of reaction at…

Q: A student is attempting to determine the heat capacity of a Styrofoam cup calorimeter by pouring hot…

A: Given: Cold Water : Mass = 21.2455 g                       Initial Temperature = 20.36oC…

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.