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The amount of energy required to change the state of a substance depends on how strong or weak the bonds between the molecules are. For substances with strong bonds at standard temperature and pressure, like diamonds, it is extremely difficult to separate the molecules, whereas substances with weak bonds, like helium, remain in a gaseous form and do not condense into liquid or solid states. In this free online chemistry course you learn more about factors that affect the chemical nature of substances. You will learn why substances changing state can also be affected by mixing substances together. The course explains about using water as a solvent and mixing in different substances to see the effect on the boiling and melting points of the solution. This is followed by step by step examples of working out what the change in boiling or melting point will be based on the amount of solute added. This chemistry course will be of great interest to all students who wish to pursue a career in any of the sciences such as chemistry, physics, biology or geology, or the individual learner who simply wants to learn more about factors that affect the chemical nature of substances.
Learning outcomes: - Understand how bond strength affects state change; - Learn about the different types of bonds; - Learn about the different types of suspension - See how a solute can change the boiling and freezing points of a solvent; - Understand how vapour pressure affects evaporation and condensation.
All Alison courses are free to enrol, study and complete. To successfully complete this Certificate course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Certificate course, you have the option to acquire official Certification, which is a great way to share your achievement with the world. Your Alison Certification is:
Ideal for sharing with potential employers - include it in your CV, professional social media profiles and job applications
An indication of your commitment to continuously learn, upskill and achieve high results
An incentive for you to continue empowering yourself through lifelong learning
Alison offers 3 types of Certification for completed Certificate courses:
Digital Certificate - a downloadable Certificate in PDF format, immediately available to you when you complete your purchase
Certificate - a physical version of your officially branded and security-marked Certificate, posted to you with FREE shipping
Framed Certificate - a physical version of your officially branded and security-marked Certificate in a stylish frame, posted to you with FREE shipping
All Certification is available to purchase through the Alison Shop. For more information on purchasing Alison Certification, please visit our faqs. If you decide not to purchase your Alison Certification, you can still demonstrate your achievement by sharing your Learner Record or Learner Achievement Verification, both of which are accessible from your Dashboard. For more details on our Certification pricing, please visit our Pricing Page.