Worksheet: Calorimetry | Physics Class 10 ICSE PDF Download

Part A — Multiple Choice Questions

Q1. The SI unit of heat (energy) is:

(a) Calorie

(b) Joule

(c) Erg

(d) Watt

Q2. When pure ice at 0°C melts to water at 0°C, the temperature of the mixture:

(a) Rises

(b) Falls

(c) Stays constant

(d) Becomes 100°C

Q3. The specific heat capacity of a substance tells us:

(a) Heat needed to raise the body’s temperature by 1°C

(b) Heat needed to raise 1 kilogram of the substance by 1°C

(c) Heat needed to melt 1 kilogram of the substance

(d) Heat released when water freezes

Q4. Coastal places have a moderate climate mainly because water has:

(a) Low specific heat capacity

(b) High specific heat capacity

(c) No specific heat capacity

(d) High latent heat of vaporisation only

Q5. Which statement about impurities is correct?

(a) Impurities increase the melting point

(b) Impurities decrease the melting point

(c) Impurities do not affect the melting point

(d) Impurities make the temperature jump to 100°C

Part B — Short Answer Questions 

Q6. What is heat capacity? How is it different from specific heat capacity?

Q7. Why is a calorimeter made of copper?

Q8. Why do farmers flood fields during a cold night in winter?

Q9. Explain the principle of calorimetry (principle of mixtures).

Q10. What is latent heat? Give one example.

Part C — Long Answer Questions

Q11. How much heat is required to raise the temperature of 200 grams of water from 25°C to 55°C? (Specific heat capacity of water = 4200 J per kg per °C)

Q12. Explain how impurities and pressure affect the melting and boiling points of substances. Give examples.

Q13:How much heat is required to melt 500 g of ice at 0°C into water at 0°C? (Specific latent heat of fusion of ice = 3.34 × 10⁵ J per kg)