JAMB and WAEC Physics questions: Quantity of heat

24 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Quantity of heat· JAMB

   Water is used in car radiators mainly because it has a

   • Ahigh density
   • Blow boiling point
   • Chigh specific heat capacity
   • Dlow freezing point

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2. Question 22· Quantity of heat· JAMB

   0.5 kg of water at 80 °C is mixed with 0.5 kg of water at 20 °C. Find the final temperature, ignoring heat losses.

   • A100 °C
   • B60 °C
   • C40 °C
   • D50 °C

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3. Question 23· Quantity of heat· JAMB

   A 200 g piece of metal at 100 °C is dropped into 100 g of water at 20 °C. The final temperature is 30 °C. Find the specific heat capacity of the metal, ignoring heat losses. (c of water = 4200 J/(kg K))

   • A150 J/(kg K)
   • B600 J/(kg K)
   • C4200 J/(kg K)
   • D300 J/(kg K)

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4. Question 24· Quantity of heat· JAMB

   A 0.2 kg metal at 100 °C is put into 0.5 kg of water at 20 °C, and the final temperature is 25 °C. Find the specific heat capacity of the metal. [c of water = 4200 J/kg K]

   • A1,400 J/kg K
   • B700 J/kg K
   • C350 J/kg K
   • D525 J/kg K

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   Explanation and discussion