2. 677 grams of ethanol (2.57 J/g°C) starts at a temperature of 2°C. If energy is added to raise its temperature to 71°C, how many Joules were added? Note: 1 kilogram = 1000 grams 1 Calorie = 1 kcal = 1000 calories OF to °C: [(T-32)x 5 ]-9 3. A nail made of iron (c=0.45 J/g°C) has 34,500 Joules added to it. If the nail's temperature goes from 11°C to 892°C, what is the mass of the nail? 4. A box of Penguin Flakes® Cereal TM has 540 Calories. If all of these calories are used to heat up a bathtub of water (c = 1.00 cal/g°C) by 10.0°C, how many kilograms of water are in the bathtub?
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.
![2. 677 grams of ethanol (2.57 J/g°C) starts at a temperature of 2°C. If energy is added to raise its
temperature to 71°C, how many Joules were added?
Note: 1 kilogram = 1000 grams
1 Calorie = 1 kcal = 1000 calories
OF to °C: [(T-32 ) x 5 ]-9
3. A nail made of iron (c=0.45 J/g°C) has 34,500 Joules added to it. If the nail's temperature goes from
11°C to 892°C, what is the mass of the nail?
4. A box of Penguin Flakes® Cereal TM has 540 Calories. If all of these calories are used to heat up a
bathtub of water (c = 1.00 cal/g°C) by 10.0°C, how many kilograms of water are in the bathtub?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F24bf2450-39e8-47a2-b6d3-2df49a54adbe%2F71e90ba0-1549-4e8a-8756-0035460ce499%2Fz149eq7_processed.jpeg&w=3840&q=75)
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