Entropy and Free Energy

Institution: 
Description: 

This is an Open Educational Resource designed to summarise key concepts in thermodynamics that are required for entry to an undergraduate course. The resource is designed for first year undergraduates and revisits ideas from A-level. It also begins to show how they are applied early in a University course. The resource was created as part of The Royal Society of Chemistry’s work under the National HE STEM Programme.

Learning Objectives - on completion of this activity you should be able to:
* Relate entropy to the temperature and state of a substance
* Calculate DS for the system and surroundings
* Calculate DG
* Use DS or DG to predict whether a process will be spontaneous
* Describe the limitations of DS or DG for predicting whether a reaction will occur
* Appreciate the connection between entropy and the distribution of energy between quantised energy levels in the system.

It is anticipated that users will have some knowledge of A-level chemistry before undertaking the activity but, even with good subject knowledge, there should also be some material here they are unfamiliar with. This resource is not designed to support any specific A-level specification but may also be used in schools alongside other resources where appropriate.

Related Resources
This resource builds on some of the ideas presented in the activities on dynamic equilibria. Other chemistry resources are also available:

This OER has been created in Articulate and is made available as an interactive learning object for your VLE. The associated PowerPoint file may also be useful for learning and teaching. Please see the read me file for information on how to use and adapt the resource and for known errors.

Author: 
Declan Fleming
Keywords: 
chemistry,thermodynamics,entropy,temperature,DS,DG,quantised energy levels

Add new comment

Creative Commons

Creative Commons licences are used to provide end-users with permission to use, reuse and remix content in a variety of ways. Further information on the licences can be found on the Creative Commons website.

All resources in the OSTRICH OER repository have been made available under a Creative Commons Licence. Since the nature of the licence for each resource may vary, specific licences will be clearly marked on each OER record page. A link will be provided to a Creative Commons licence deed that sets out the provisions of that licence and describes how you are permitted to use the resource in question.

OSTRICH Takedown Policy

The OSTRICH Team has endeavoured to ensure that no material deposited in the OSTRICH OER repository infringes any third party property rights or otherwise infringes UK law. Some materials may include links to third party sites. Neither the OSTRICH project nor the Universities of Bath or Derby endorse these sites and cannot be held responsible for their content.

Should you discover any content in the repository that you believe infringes your rights, please notify the OSTRICH Team immediately at oer@bath.ac.uk and include in the email the relevant details as set out in the OSTRICH project takedown policy. Complaints will be dealt with in accordance with this takedown policy, which can be downloaded as a PDF here.

All the information and links contained within these resources are correct at the time of issue. However, web links and e-mail addresses may change over time, so please let us know by email (oer@bath.ac.uk), if you spot something that doesn’t work.