How many Cal need to be removed to condense 50.0 g of steam at 150.0 °C to water at 4.00 °C ? Use the conversions given below. First, the steam must first be cooled from 150.0 °C down to 100.0 °C, a change of i Second, the steam at 100.0 °C must be condensed to water at temperature Third, the water must be cooled from 100.0 °C to 4.00 °C, a change of i The answer is the addition of these three processes ( ( Р a. 0.504 cal/g °C f. 150.0 °C 1. 25.0 °C s. 4,795 y. -25.0 °C )(50.0 g)( )(50.0 g) )(50.0 g) Cal b. 79.7 cal/g g. 100.0 °C m. 37.0 °C t. 26,950 z. 5.00 c. 0.999 cal/g °C i. 50.0 °C h. 50.0 g n. 5.00 g u. 399.5 aa. 184.8 0. 647 v. 184.8 d. 539 cal/g j. 96.0 °C p. 33.0 w. 32,988 1,243 , there is no change in cal cal cal cal = e. 0.497 cal/g °C k. 4.0 °C r. 63.0 x. 25.0 °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.
5. How many Cal need to be removed to condense 50.0 g of steam at 150.0 oC to water at 4.00 oC ? ( answer is 33.0 CAL)
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