A 150 g sample of solid nh4no3 was added to 350 ml of water, Ask an Expert

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A 1.50 g sample of solid NH4NO3 was added to 35.0 mL of water in a styrofoam cup (insulated from the environment) and stirred until it dissolved. The temperature of the solution dropped form 22.7 C to 19.4 C. What is the heat of reaction for dissolving NH4NO3, expressed in KJ/mol?

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