Questio 19 If 46.1 g Cu at 11.6 °C is placed in 85.0 g H20 at 72.4 °C, what is the final temperature of the mixture? The specific heat capacities of copper and water are 0 O a. 63.6 °C Ob.71.2 °C OG 69.5 °C O d. 51.0 °C O e. 42.0 °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.
![Question 19
If 46.1 g Cu at 11.6 °C is placed in 85.0 g H20 at 72.4 °C, what is the final temperature of the mixture? The specific heat capacities of copper and water are 0.385 J/g°C and 4.184 J/g°C, respectively.
O a. 63.6 °C
O b. 71.2 °C
O. 69.5 °C
O d. 51.0 °C
O e. 42.0 °C](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7ded739c-ff6d-4ee2-ae36-0e68fce8face%2F3f232b6d-17bf-4133-9e6a-271ee0c2d565%2Ffjr7svl_processed.jpeg&w=3840&q=75)
![Question 18
Which of the following phase transitions is/are endothermic?
1. liquid water freezing to a solid at its normal freezing point of 0.0°C.
2. the sublimation of solid carbon dioxide into the gas phase.
3. gaseous sulfur dioxide condensing into a liquid at its boiling point of -10.0°C.
O a. 3 only
O b. 2 only
Oc. 1, 2, and 3
O d. 1 only
O e. 1 and 2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7ded739c-ff6d-4ee2-ae36-0e68fce8face%2F3f232b6d-17bf-4133-9e6a-271ee0c2d565%2Fuqj521h_processed.jpeg&w=3840&q=75)
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