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What quantity of heat is required to convert 20 g of ice at 0 ºC...

Physics
JAMB 2022

What quantity of heat is required to convert 20 g of ice at 0 ºC to water at the same temperature? (Specific latent heat of ice = 336 Jg\(^{-1}\))

  • A. 7.06 x 10\(^{3}\)J
  • B. 5.38 x 10\(^{3}\)J
  • C. 6.72 x 10\(^{3}\)J
  • D. 1.35 x 10\(^{3}\)J
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Correct Answer: Option C
Explanation

quantity of heat = mass * Specific latent heat → 20 * 336 

quantity of heat = 6720j or  6.72 x 10\(^{3}\)J

There is an explanation video available below.

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Explanation Video

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
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