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Answer in General Chemistry for Megan Wakley #149869

Author:
March 18th, 2023

Two processes occur here that require energy. (i) Phase change(melting), and (ii) temperature change;

I. Q during Phase change

Q1=mLf

“=dfrac{175.0}{1000}Kgx334J/Kg”

= 58.45J

II. Q for temperature change

Q2=mC“Delta”T

“=175.0gxdfrac{4.18J}{g^oC} x 45.0^oC”

= 32,917.5J

Add up for total energy

QT=Q1 + Q2

= 58.45J + 32,917.5J

= 32,975.98J

= 32.98kJ

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