Thermal Physics: Visual Data Analysis
Chapter 2 • Paper 2 MCQ Format • 15 Questions
Focus: Diagrams, Graphs, Experimental Setups
Study the particle arrangement diagrams below. Which diagram represents the LIQUID state?
In which state of matter can thermal expansion occur due to INCREASED PARTICLE SEPARATION (not just increased vibration)?
The diagram shows a smoke particle observed under a microscope. What causes the random zig-zag motion?
Which property of particles in a GAS explains why gases can be easily compressed?
Which diagram CORRECTLY shows the difference between evaporation and boiling?
Study the heating curve graph. What is happening at section B-C (first flat section)?
On the heating curve, what does the SECOND flat section (D-E) represent?
Which graph CORRECTLY represents the relationship between pressure (p) and volume (V) for a fixed mass of gas at constant temperature (Boyle's Law)?
A graph shows pressure (p) vs 1/V for a gas. What shape should this graph be if Boyle's Law is obeyed?
The cooling curve shows a pure substance cooling from gas to solid. At which section is CONDENSATION occurring?
Study the specific heat capacity experiment setup. Why is INSULATION wrapped around the metal block?
In the specific heat capacity experiment, the thermometer bulb must be inserted into a HOLE in the block (not just touching the surface). Why?
Study the thermometer diagram. A student reads the temperature as 24°C. What error might they have made?
In the Brownian motion experiment, why must the observer use a MICROSCOPE to see the smoke particles?
The diagram shows a liquid-in-glass thermometer. Which feature ensures SENSITIVITY (large change in reading for small temperature change)?
⚠️ Common Examiner Traps in Visual Analysis:
- • Particle Diagrams: Gas particles are FAR APART (not just moving fast)
- • Heating Curves: First flat = Melting, Second flat = Boiling
- • Boyle's Law: p vs V is a CURVE, p vs 1/V is a STRAIGHT LINE
- • Parallax Error: Eye must be LEVEL with meniscus/scale
- • Brownian Motion: We see SMOKE particles (not air molecules)
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