Question #d39c9

↳Redirected from "Which following pairs of atoms, have a lower electron affinity? a) Ca,K b) I,F c) Li, Ra. I seriously don't know anything about electron affinity all ik that it can buy another element"
1 Answer
Aslam S.
Jul 10, 2015

Yes

Explanation:

Using the First law of Thermodynamics (Energy Conservation)

#delta W+delta U+delta E=0#

as temperature is constant so #delta E =0#
No external energy enters or leaves the system (air-water)

Ice expands on freezing (anomalous expansion of water)

Energy is used to push against the atmosphere due to expansion.

Thus internal energy goes down - so heat is lost.

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