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A new hair straitening product is reacted with keratin in a coffee cup calorimeter. There were 45 g of water in the calorimeter and the temperature changed from 23 °C to 32 °C over the course of the reaction. In this reaction the system would be defined as [ Select ] the surroundings would be defined as [ Select ] . The reaction [ Select ] heat and is [ Select ] .

Sagot :

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