Table of Contents
- 1 What is the relationship between the energy of the system the energy of the surroundings and the energy of the universe?
- 2 How you could determine if it was an endothermic or an exothermic reaction?
- 3 How does it relate to energy exchanges between a thermodynamic system and its surroundings?
- 4 What is meant by exothermic and endothermic reaction?
- 5 In which direction does energy flow into the system from the surroundings from the system into the surroundings?
- 6 Why is it so important to define the system and surroundings?
What is the relationship between the energy of the system the energy of the surroundings and the energy of the universe?
The energy of the system and surroundings never change, but the energy of the universe is continually changing. The surroundings experience the opposite energy change as the system to keep the total energy in the universe constant.
How you could determine if it was an endothermic or an exothermic reaction?
So if the sum of the enthalpies of the reactants is greater than the products, the reaction will be exothermic. If the products side has a larger enthalpy, the reaction is endothermic.
How does it relate to energy exchanges between a thermodynamic system and its surroundings?
energy exchanges between a thermodynamic system and its surroundings? The law of conservation of energy states that energy can be neither created nor destroyed. Energy can be transferred from one object to another, and it can assume different forms. In an energy exchange, the surroundings gain energy, and vice versa.
What is the system and surroundings in chemistry?
The system consists of those molecules which are reacting. The surroundings are everything else; the rest of the universe. For example, say the above reaction is happening in gas phase; then the walls of the container are part of the surroundings.
When the system does work on the surroundings?
When a system does work on the surroundings, the system’s internal energy decreases. When a system has work done on it, the internal energy of the system increases. Like heat, the energy change from work always occurs as part of a process: a system can do work, but doesn’t contain work.
What is meant by exothermic and endothermic reaction?
An exothermic reaction is a chemical reaction in which heat is released. An endothermic reaction is a chemical reaction in which heat is absorbed.
In which direction does energy flow into the system from the surroundings from the system into the surroundings?
In which direction does energy flow? a. If the reactants have a lower internal energy than the products, ΔEsystem is positive and energy flows into the system from the surroundings.
Why is it so important to define the system and surroundings?
In thermodynamics, it is imperative to define a system and its surroundings because that concept becomes the basis for many types of descriptions and calculations.
How do you tell if work is done by the system or surroundings?
If system volume expands against a force, work is done by the system. If system volume contracts under a force, work is done on the system.