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QLDPhysicsQuick questions
Unit 1: Thermal, nuclear and electrical physics
Quick questions on Specific heat capacity and latent heat (QCE Physics Unit 1)
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is using grams instead of kilograms?Show answer
Both formulas are written for SI units. A $200$ g sample is $0.200$ kg, not $200$ kg.
What is treating temperature change in celsius differently from kelvin?Show answer
$\Delta T = 30°$C $= 30$ K. Both are correct because the units of temperature interval are identical in size.
What is forgetting to include the phase change?Show answer
A common QCAA trap is "ice at $-5°$C to water at $20°$C". You need three stages: warm ice, melt ice, warm water. Skipping the latent heat gives an answer about $25$ times too small.
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