The q value for the following reaction is 178.0 kJ for every mole of CaCO3 that reacts: CaCO3(s)→ CaO(s) + CO₂(g) How much heat would be required to decompose 4.00 mol CaCO3(s), and is the reaction endothermic or exothermic? Your answer
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.
SUBJECT : GENERAL CHEMISTRY 2
TOPIC : HEAT AND CALORIMETRY
![8) Refer to the given situation below to evaluate if this statement is TRUE
or FALSE: This reaction is endothermic and has a negative value of q.
The following reaction absorbs 393 kJ of heat for each mole of CO₂ that reacts. CO₂(g) → C(s)
+ O₂(g)
True
False
9) Refer to the given situation below to evaluate if this statement is TRUE
or FALSE: This reaction is exothermic and has a negative value of q.
The following reaction absorbs 393 kJ of heat for each mole of CO₂ that reacts. CO₂(g) → C(s)
+ O₂(g)
True
False
10) Consider the following specific heats of metals. If the same amount
of heat is added to 25.0 g of copper and calcium, both at the same initial
temperature, which metal will have the higher final temperature?
Metal
copper
calcium 0.656
aluminum 0.895
0.448
0.129
iron
lead
copper
Specific Heat [J/(g°C)]
0.377
calcium](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9f3351c3-9657-43f5-a3ee-8e68522de4c1%2F746620c0-f652-4648-9f01-d9ad55cceeeb%2F4zwqf2c_processed.png&w=3840&q=75)
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 1 images
