For the following processes, calculate the change in internal energy of the system and determine whether the process is endothermic or exothermic 1. A balloon is heated by adding 255 J of heat while it does 546 J of work on atmosphere. 2. A gas is cooled and releases 0.565 kJ of heat into the atmosphere while the atmosphere does 65 J of work on the gas. 3. The surroundings do 1.44 kJ of work compressing a gas in a perfectly insulated cylinder such that no heat can be exchanged.
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.
For the following processes, calculate the change in internal energy of the system and determine whether the process is endothermic or exothermic
1. A balloon is heated by adding 255 J of heat while it does 546 J of work on atmosphere.
2. A gas is cooled and releases 0.565 kJ of heat into the atmosphere while the atmosphere does 65 J of work on the gas.
3. The surroundings do 1.44 kJ of work compressing a gas in a perfectly insulated cylinder such that no heat can be exchanged.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
