How much heat is needed to transform 500g of ice at -20        
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                                        2021-09-23T02:38:16-0400
                    
                                                    
                                
Q=L×m+mCPΔT
0.5× 4184 × -20
= 41840kJ/Kg
 
                                                 
                 
                    
        
            
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