Kinetic Theory Quiz
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5 questions, one answer each
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1. Which state of matter has particles that are far apart and move randomly at high speed?
- A. Solid
- B. Liquid
- C. Gas
- D. Plasma
2. What does specific heat capacity measure?
- A. The energy to change the state of 1 kg of a substance
- B. The energy to change the temperature of 1 kg of a substance by 1°C
- C. The total energy stored in an object
- D. The rate at which a substance cools down
3. A 0.5 kg block of a substance (c = 900 J/kg°C) is heated so its temperature rises by 20°C. How much energy was transferred?
- A. 900 J
- B. 9000 J
- C. 18000 J
- D. 4500 J
4. Why does the temperature stay constant on the flat sections of a heating temperature-time graph?
- A. No energy is being transferred during that time
- B. The energy supplied is being used to change state rather than raise temperature
- C. The thermometer stops working at that temperature
- D. The substance is cooling instead of heating
5. A student says impurities always raise both the melting point and the boiling point of a substance. What is wrong with this claim?
- A. Impurities have no effect on melting or boiling points at all
- B. Impurities lower the melting point but raise the boiling point
- C. Impurities raise the melting point but lower the boiling point
- D. Impurities only affect gases, not solids or liquids