A 275-g sample of nickel at 100.0°C is placed in 100.0 mL of water at 22.0°C. What is the final temperature of the water? Assume no heat is lost to the calorimeter. C(H₂O) = 4.18 J/(g.K), C(Ni) = 0.444 J/(g.K)
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.
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Thank you. I'm just confused as what is is the reason 122.1 has to be multiplied by (-45543.23)?
by Bartleby ExpertHeat lost by nickel = Heat gained by waterQNi = Qw m×CNi×(TNi – Tf) = mw×Cw×(Tf – Tw)275 g×0.444 Jg K×373-Tf=100 g×4.184 Jg K×Tf-295122.1×373-Tf=418.4×Tf-295373-Tf=3.4267×Tf-2953.4267 Tf-1010.8763 = 373-Tfsolve for Tf mathematicallyTf=312.62 K
This part is very confusing.
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