LATENT HEAT MATTER IN OUR SURROUNDINGS 01 Class 9th Science (Chemistry) (Practice Sheet) 1 What is latent heat? A. Heat that raises the temperature B. Hidden heat during state change C. Heat that increases kinetic energy D. Heat involved in phase transitions 2 Why is latent heat called "latent"? A. It remains constant B. It becomes hidden during phase change C. It is not measurable D. It is hard to detect 3 What does latent heat of fusion refer to? A. Heat required for boiling B. Heat required for melting C. Heat involved in kinetic energy D. Heat causing a rise in temperature 4 What is the latent heat of fusion for ice? A. 2.25 × 105 J/kg B. 3.34 × 105 J/kg C. 1.5 × 105 J/kg D. 4.5 × 105 J/kg 5 What is the latent heat of vaporization? A. Heat required for melting B. Heat required for boiling C. Heat involved in kinetic energy D. Sensible heat 6 Explain the concept of latent heat and why it is considered "hidden" during a change of state. 7 Differentiate between latent heat of fusion and latent heat of vaporization. 8 Why is latent heat crucial for phase transitions, and how does it differ from sensible heat? 9 How does latent heat contribute to the concept that temperature does not rise during a change of state? 10 How does latent heat of vaporization contribute to the conversion of a liquid into a gas, and why does the temperature remain constant during this phase change? Page 1 Email: Phone No: Website:
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