INSTANT COLD PACK ammonium nitrate Inner bag of water SINGLE US E ONLY Figure 5.16 An instant cold pack consists of a bag containing solid ammonium nitrate and a second bag of water. When the bag of water is broken, the pack becomes cold because the dissolution of ammonium nitrate is an endothermic process that removes thermal energy from the water. The cold pack then removes thermal energy from your body.
INSTANT COLD PACK ammonium nitrate Inner bag of water SINGLE US E ONLY Figure 5.16 An instant cold pack consists of a bag containing solid ammonium nitrate and a second bag of water. When the bag of water is broken, the pack becomes cold because the dissolution of ammonium nitrate is an endothermic process that removes thermal energy from the water. The cold pack then removes thermal energy from your body.
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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.42QP: A soluble salt, MX2, is added to water in a beaker. The equation for the dissolving of the salt is:...
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Question
Would the amount of heat absorbed by the dissolution as given below appear greater, lesser, or remain the same if the heat capacity of the calorimeter were taken into account? Explain your answer.
When solid ammonium nitrate dissolves in water, the solution becomes cold. This is the basis for an “instant ice pack” (see image). When 3.21 g of solid NH4NO3 dissolves in 50.0 g of water at 24.9 °C in a calorimeter, the temperature decreases to 20.3 °C.
Calculate the value of q for this reaction and explain the meaning of its arithmetic sign. State any assumptions that you made.
Transcribed Image Text:INSTANT
COLD PACK
ammonium nitrate
Inner bag of water
SINGLE US E ONLY
Figure 5.16 An instant cold pack consists of a bag containing solid ammonium nitrate and a second bag of
water. When the bag of water is broken, the pack becomes cold because the dissolution of ammonium
nitrate is an endothermic process that removes thermal energy from the water. The cold pack then removes
thermal energy from your body.
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