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liquid ammonia is used in ice factory for making Ice from water water at 20 degree celsius is to be converted into 2 kg ice at 0 degree Celsius how many grams of ammonia are to be evaporated |
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Answer» e heat taker is ammonia (NH3)Heat giver is the water (20°-0°) and from 0° LIQUID to solid 0° i.e. (0°-0°)Solution:-Q1 =Q2 + Q3mL = MC t + mcLwhere L= latent heat of ammonia i.e. 341(L.H.S)L = latent heat of water i.e. 80m= mass of water i.e. 2000gm (R.H.S)t = change in temperature (20°- 0°)Substituting the values we GET,m×341 =2000 ×1 × (20 - 0) + 2000 × 80341m = 2000 × 20 + 160000341m = 40000 + 160000341m = 200000m = 200000÷341 m = 586.51 gmTherefore, the ammonia USED in the factory is 586.51 gram |
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