Home
Class 10
PHYSICS
Liquid ammonia is used in ice factory ...

Liquid ammonia is used in ice factory for making ice from water. If water at`20^(@)C ` is to be converted into 2 kg ice at `0^(@)C `, how many grams of ammonia are to be evaporated ?
(Given `:` The latent heat of vaporization of ammonia `= 341 cal //g ` )

Text Solution

Verified by Experts

Data : `m_(1) = 2 kg , DeltaT_(1) = 20^(@) C -0^(@) C = 20^(@)C`
` c_(1) = 1" kcal/kg."^(@)C , L_(1) ("ice") = 80 "kcal/kg", L_(2)` (vaporization of ammonia)
= 341 cal/g = 341 kcal/kg, `m_(2) = ? `
`Q_(1)` = (heat lost by water) = ` m_(1)c_(1)DeltaT_(1) + m_(1)L_(1)`
2 kg `xx 1 kcal//kg.^(@)C xx 20^(@)C + 2kg xx 80` kcal/kg
40 Kcal + 160 kcal = 200 kcal
` Q_(2)` ( heat absorbed by ammonia) = `m_(2)L_(2) =m_(2) xx 341` kcal/ kg ltbRgt According to the principal of heat exchange , ` Q_(1) = Q_(2)`
200 kcal. `= m_(2) xx 341` kcal/ kg
` m_(2) = 200/341 " kg" =` 0.5864 kg = 586 .4 g
586.4 g of ammonia are to be evaporated .
Promotional Banner

Topper's Solved these Questions

  • NUMERICAL EXAMPLES

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Refraction of Light|4 Videos

  • NUMERICAL EXAMPLES

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Lenses|14 Videos

  • NUMERICAL EXAMPLES

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Effects of Electric Current|9 Videos

  • NAME THE FOLLOWING/WRITE THE CHEMICAL FORMULA/ELECTRONIC CONFIGURATION

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Lenses|7 Videos

  • PARAGRAPH BASED QUESTIONS

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise LENSES|5 Videos

Similar Questions

Explore conceptually related problems

Liquid ammonia is used in ice factory for making ice from water. If water at 20^@C is to be converted into 2 kg ice at 0^@C , how many grams of ammonia are to be evaporated? (Given: Latent heat of vaporisation of ammonia= 341 cal/g)

Liquid ammonia 1s used in ice factory for making ice from water. If water at 30^(@)C is to be converted into 800 g ice at 0^(@)C , how many grams of ammonia are to be evaporated? (Given: Latent heat of vaporisation of ammonia = 341 cal/g)

Calculate the amount of heat required to convert 80g of ice at 0^(@)C into water at the same temperature . ( Specific latent heat of fusion of ice = 80 cal //g )

How many calories of heat will be absorbed when 2kg of ice at 0^(@)C melts ? ( Specific latent heat of fusion of ice = 80 cal //g )

M g of ice at 0^@C is to be converted to water at 0^@C . If L is the latent heat of fusion of ice, the quantity of heat required for the above operation would be

Calculate the amount of heat required to convert 15g of ice of 100^(@)C into steam. ( Specific latent heat of vaporization ofwater= 540 cal//g )

Find the heat required to convert 20 g of iceat 0^(@)C into water at the same temperature. ( Specific latent heat of fusion of ice =80 cal//g )

Calculate change in entropy when 5g of pure ice melts to form water at 0^(@)C Given latent heat of ice is 80cal//g at 0^(@)C .

Calculate the quantity of heat released during the conversion of10g of ice cold water ( temperature 0^(@)C ) into ice at the same temperature . ( Specific latent heat of freezing of water = 80 cal //g )