What would be the final temperature of thesystem is 70 grams of lead at 150 degrees C is dropped into 30 grams of water at 20 degrees C in an insulated container? Specific heat of liquid water is 4.18 J/g*degC Specific heat of lead (solid) is 0.128 J/g*deg C
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
What would be the final temperature of thesystem is 70 grams of lead at 150 degrees C is dropped into 30 grams of water at 20 degrees C in an insulated container?
Specific heat of liquid water is 4.18 J/g*degC
Specific heat of lead (solid) is 0.128 J/g*deg C
--- I keep coming up wtih an absurb number and wonder if I'm and missing a heat of vaporizaton somewhere. I'm looking for the solution.
I was basing this on: (70g)(0.128J/g*deg C)[(150 -x)deg C] = (30g)(4.18J/g*deg C)[(x+20)deg C)]. I'm missing something! Thanks, Heather (middle name)
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