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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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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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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709