& A 53.0 gram nickel bolt (c= 0.44 Jig C) is heated until it glows and is then dropped into 722 grams of water (originally at 25 C) After they reach equilibrium, they both have a temperature of 42"C. What was the high temperature of the bolt? Note: 1 kilogram = 1000 grams 1 Calorie 1 kcal = 1000 calories F to °C [(T-32) x 5 1-9
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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the water tart p
37 C 17.8 C = 19.2 C (ANSWER)
& A 53.0 gram nickel bolt (c 0.44 Jig C) is heated until it glows and is then dropped into 722 grams of
water (originally at 25 C) After they reach equilibrium, they both have a temperature of 42"C. What
was the high temperature of the bolt?
Note: 1 kilogram = 1000 grams
1 Calorie = 1 kcal = 1000 calories
oF to °C [(T-32) x 5 ]-9
9. A 65.5 gram piece of glass (c = 0.840 Vg C) is heated to 177 C and dropped into a beaker containing
450 grams of ethanol (c = 2.46 Ng"C.) After they reach equilibrium, their temperature is 51.0"C. What
was the starting temperature of the ethanol?
10. A handful of sliced potatoes (c-4.20 Jg"C) are dropped into 1250 grams of hot oil (c = 2.00 Ng"C)
originally at 425'F. If the potatoes started with a temperature of 65"F and they reach an equilibrium
temperature of 371 F, how many grams of potato slices were added to the oi?
11. (challenge problem) A 6,355 gram ingot of uranium (c=0.12 Ng "C) has a temperature of 1050"F
and must be cooled down immediately. It is dropped into a bucket containing a mixture of water
(c4.18 Jig "C) and methanol (c=2.53 Jig"C) with a starting temperature of 39"F. After all of this, they
settle to a final temperature of 115"F. f the water absorbed exactly 4 times as much energy as the
methanol, how many kilograms of liquid were in the bucket? (hint: the temperature change for the water
and methanol are the same)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F24bf2450-39e8-47a2-b6d3-2df49a54adbe%2Fd7dfee32-5271-48f6-8723-e9845c4848e3%2Fd3no4kr_processed.jpeg&w=3840&q=75)
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