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ICSE Class 10 Heat: calorimetry, specific heat capacity and latent heat — practice questions — page 2

Explore 66 free Heat: calorimetry, specific heat capacity and latent heat questions in ICSE Class 10 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Heat: calorimetry, specific heat capacity and latent heat questions and exercises with answers

Showing questions 31–60 of 66.

Which describes sensible heat?Read the answer and worked solution →Equal masses of ice and liquid water each receive heat at a phase boundary. Ice can use much of it to:Read the answer and worked solution →Joseph Black's key distinction in heat studies separated heat from:Read the answer and worked solution →A device used to measure heat transfer in calorimetry is a:Read the answer and worked solution →A 50 g sample with L = 100 kJ kg−1 changes phase. Required heat?Read the answer and worked solution →At a phase change, specific heat is undefined because:Read the answer and worked solution →In an insulated mix, A loses 12 kJ as B gains it. This shows:Read the answer and worked solution →Equal masses of water and mercury gain equal heat. Water warms less because it has:Read the answer and worked solution →When steam condenses, why can it deliver much heat to a surface?Read the answer and worked solution →Two bodies have equal heat capacities. For the same heat input, they undergo equal:Read the answer and worked solution →A 200 g solid absorbs 16 kJ while melting. Its specific latent heat is:Read the answer and worked solution →A 0.25 kg liquid cools by 8 K and releases 6 kJ. Its c is:Read the answer and worked solution →Equal water masses at 20°C and 80°C mix without heat loss. Neglect the cup. Final T?Read the answer and worked solution →Water80°C mixes with water20°C to reach40°C. No loss; cup negligible. Hot:cold mass?Read the answer and worked solution →No-loss mix: metal C=100J/K at100°C, water C=400J/K at20°C. Cup negligible. Final T?Read the answer and worked solution →100g metal100°C heats 100g water20→30°C. No losses; cup negligible. cmetal/cwater?Read the answer and worked solution →In an insulated calorimeter, metal loses900J and water gains700J. The cup gainsRead the answer and worked solution →No-loss hot-metal/cold-water test ignores cup heat gain. Inferred metal c isRead the answer and worked solution →A hot metal and cool water reach thermal equilibrium. Which quantity is then equal?Read the answer and worked solution →Water60°C mixes with water20°C, with no heat loss or cup effect. Which final T is impossible?Read the answer and worked solution →Sea water warms more slowly than nearby land mainly because of itsRead the answer and worked solution →100cal raises a body's temperature by2K. Take1cal=4.2J. Heat capacity?Read the answer and worked solution →A 100W heater warms a body of C=200J/K by10K. No loss or phase change. Time?Read the answer and worked solution →A 100W heater melts50g ice0°C in168s with no losses. Specific latent heat?Read the answer and worked solution →100g ice−10°C becomes water0°C. cice=2.1kJ/(kgK), Lf=334kJ/kg. Heat absorbed?Read the answer and worked solution →Supply41.8kJ to100g ice0°C. Lf=334kJ/kg, cwater=4.2kJ/(kgK). Final water T?Read the answer and worked solution →100g water10°C freezes to ice0°C. cwater=4.2kJ/(kgK), Lf=334kJ/kg. Heat released?Read the answer and worked solution →100g water40°C+20g ice0°C. cwater=4.2J/(gK), Lf=336J/g. No loss; cup negligible. Final T?Read the answer and worked solution →50g ice0°C receives4.2kJ from cooling water. Lf=336J/g. No other heat. Ice remaining?Read the answer and worked solution →Water0°C freezes to warm20g ice−10→0°C. cice=2.1J/(gK), Lf=336J/g. No other heat. Mass frozen?Read the answer and worked solution →

Worked practice questions

Which describes sensible heat?

  1. Energy that changes temperature
  2. Energy released on condensation
  3. Energy absorbed during boiling
  4. Energy in melting process
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Correct answer: A. Energy that changes temperature

Sensible heat has a resultant change in temperature.

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Equal masses of ice and liquid water each receive heat at a phase boundary. Ice can use much of it to:

  1. Warm while melting
  2. Melt without warming
  3. Increase its mass
  4. Lower its latent heat
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Correct answer: B. Melt without warming

At melting, heat goes into phase change at constant temperature.

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Joseph Black's key distinction in heat studies separated heat from:

  1. Mass of a body
  2. Volume of a body
  3. Pressure of air
  4. Temperature
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Correct answer: D. Temperature

Black's work identified latent and specific heat and distinguished heat from temperature.

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