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23 Nov 2019
1 ) In a physics lab, a student accidentally drops a 27.0-g brasswasher into an open Dewar of liquid nitrogen at 77.2 K. How muchliquid nitrogen boils away as the washer cools from 297 K to 77.2K? The latent heat of vaporization for nitrogen is 199.1kJ/kg.
2 ) What mass of water at 28.0° C added to a Styrofoam cupcontaining two 60.0-g ice cubes from a freezer at -20.0° C willresult in a final temperature of 5.0° C for the drink?
3 ) Ice at 0.0° C is mixed with 4.00 102 mL of water at 21.0° C.How much ice must melt to lower the water temperature to 0.0° C?
1 ) In a physics lab, a student accidentally drops a 27.0-g brasswasher into an open Dewar of liquid nitrogen at 77.2 K. How muchliquid nitrogen boils away as the washer cools from 297 K to 77.2K? The latent heat of vaporization for nitrogen is 199.1kJ/kg.
2 ) What mass of water at 28.0° C added to a Styrofoam cupcontaining two 60.0-g ice cubes from a freezer at -20.0° C willresult in a final temperature of 5.0° C for the drink?
3 ) Ice at 0.0° C is mixed with 4.00 102 mL of water at 21.0° C.How much ice must melt to lower the water temperature to 0.0° C?
tcranford114Lv2
30 Apr 2024
Elin HesselLv2
23 Jun 2019
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