6. Calculate the amount of energy released by cooling 59 grams of liquid water from +25°C to ice at -25°C. 599/1mol= 3.27md l8.02 59(2,09) = 123.31 mal Q m CAT
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
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Water: 4.18
Steam: 1.7
66. Calculate the amount of energy released by cooling 59 grams of liquid water from
+25°C to ice at -25°C.
599/1moll
=D3.27md
2081
Q m CAT
7. How much heat would it take to raise 5 grams of H20 from -50°C to +200°C?
8. A 20.0 g piece of a metal with specific heat of 0.080 cal/g.°C at 68 °C dropped into 15.0
ml water in a calorimeter at 23 °C. Calculate the final equilibrium temperature of the
mixture. Iml=19 of HzD @ l atm lassume this!)
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