Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: exocytosis646 on January 26, 2019, 02:42:42 PM
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The following would represent enthalpy (a change in potential energy)
a) When the surrounding air gets colder
b) When water temperature increases in a calorimeter
c) When an ice cube melts
d) When a beaker is heated with a Bunsen burner
This question has been very confusing. I believe the answer may be C since an ice cube melting is a spacial change which may be a change in potential energy. And the others represent temperature changes. But an ice cube melting could also represent a temperature change, so im not sure.
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A,B, C and D have temperature changes. Only C has an additional change. Which one?
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A,B, C and D have temperature changes. Only C has an additional change. Which one?
A potential energy change. So c is the answer. Thanks
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The substance change from solid to liquid.
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But an ice cube melting could also represent a temperature change
Could it? Does the temperature change during the melting? Why is the enthalpy of fusion called a "latent heat"?
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I don't get the question. All four involve a change in enthalpy. Have you quoted it correctly? Does it ask which involves a change of enthalpy without a change in temperature?