How much heat (kJ) is absorbed by 948.0 g of water in order for the temperature to increase from 25.00°C to 32.50°C? O 7.55 30.25 none of the above O 29.75 O 31.45
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.
Specific heat:
The amount of heat energy required to raise the temperature of one gram of a substance by one degree Celsius (or Kelvin) is known as specific heat.
The relationship between quantity of heat and change in temperature is given by,
q = mcΔT
where,
q = quantity of heat absorbed
m = mass of the substance
c = specific heat of the substance
Specific heat of water = 4.186 J/g. °C
ΔT = change in temperature = (T2 - T1)
T1 = initial temperature
T2 = final temperature
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
