Other
Thermal Physics
- Module
- Thermal Physics
- Institution
- AQA
Revision notes for A-Level AQA Physics about topic 6.2, Thermal Physics
[Show more]
Seller
Follow
Content preview
Thermal PhysicsTemperature Changes
☆ When an object is heated, whilst in a constant state, the
temperature of the object will increase.
☆ This increase depends on the energy being transferred, the mass
of the substance being heated and a property of the material
known as the specific heat capacity.
☆ Specific heat capacity is defined as the energy required to raise
the temperature of 1kg of a given substance by 1 degree Kelvin.
☆ The equation linking these factors is:
∆E = mc∆θ
Changes of State
☆ For an object to change state, the particle arrangement of the
substance must be changed.
☆ For this to happen, there must be a transfer of energy in order
for bonds to be broken or created.
☆ The amount of energy required depends on the mass of the
substance as well as the specific latent heat of the given
substance.
☆ In general, specific latent heat is the energy required to change
the state of 1kg of a substance without a change in temperature.
☆ There are two forms of specific latent heat:
1. Specific latent heat of fusion is used for the transition
between solid and liquid,
2. Specific latent heat of vaporisation is used for the
transition between liquid and gas.
∆E = ml
Internal Energy
☆ The internal energy of a substance is defined as the sum of the
randomly distributed potential and kinetic energies of the
particles that make up the substance.
☆ When a substance undergoes a temperature change, the kinetic
energy of the particles increases, resulting in an increase in
the total internal energy of the substance.
☆ This is because temperature is a measure of the average kinetic
energy of the particles in the substance.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller maisie2004s. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now