Chemistry - Thermochemistry Question with Solution | TestHub

ChemistryThermochemistryEnthalpy of ReactionEasy2 minPYQ_2020

ChemistryEasysingle choice

How much heat is required to change 5 gram ice ( $0 ° C$ ) to steam at $100 ° C$ ? Latent heat of fusion and vaporization for water are 80 cal/g and 540 cal/g respectively. Specific heat of water is 1 cal/g/k.

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Answer:

Solution:

$\underset{(0 ° C)}{I c e} \overset{q_{1}}{\to} \underset{(0 ° C)}{W a t e r} \overset{q_{2}}{\to} \underset{(100 ° C)}{W a t e r} \overset{q_{3}}{\to} \underset{(100 ° C)}{V a p o u r}$
$q = q_{1} + q_{2} + q_{3}$
$= (80 \times 5 + m s d T + 540 \times 5)$ cal
$= (80 \times 5 + 5 \times 1 \times 100 + 540 \times 5)$ cal
$= 3600$ cal

Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:ThermochemistrySubtopic:Enthalpy of Reaction

⏱ 2mℹ️ Source: PYQ_2020

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