D.) A 100.0 ml volume of water is originally at 25.0 oC. When a chunk of lead that is originally at 42.8 0C is added to the water, the temperature of the water increases to 26.8 oC. If the specific heat of lead is 0.128J/g 0C, what is the weight of the lead?
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.
D.) A 100.0 ml volume of water is originally at 25.0 oC. When a chunk of lead that is originally at 42.8 0C is added to the water, the temperature of the water increases to 26.8 oC. If the specific heat of lead is 0.128J/g 0C, what is the weight of the lead?
E.) If 100.0 gram of a metal at 100.0 oC is added to 100.0 g of water at 25.0 oC, the final temperature is 31.3 oC. What is the specific heat of the metal?
F.) Heating a 24.0 g aluminum can raises its temperature by 15.0 oC. Find the value of Q for the can in calories.
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