(a)
Interpretation:
In the statement, “Your body converts excess intake of food into fat molecules”, whether a
(b)
Interpretation:
In the statement, “Sodium reacts with water”, whether a chemical reaction is releasing energy and causing work to be done or an outside source of energy is forcing a chemical reaction to occur has to be decided.
(c)
Interpretation:
In the statement, “Sodium azide in an automobile air bag decomposes, causing the bag to inflate”, whether a chemical reaction is releasing energy and causing work to be done or an outside source of energy is forcing a chemical reaction to occur has to be decided.
(d)
Interpretation:
In the statement, “An egg is hard-boiled in a pan on your kitchen stove”, whether a chemical reaction is releasing energy and causing work to be done or an outside source of energy is forcing a chemical reaction to occur has to be decided.
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Chemistry: The Molecular Science
- 1-86 The specific heats of some elements at 25oC are as follows: aluminum = 0.215 cal/g · oC; carbon (graphite) = 0.170 caI/g oC; iron = 0.107 cal/g mercury = 0.033 1 caI/g oC. (a) Which element would require the smallest amount of heat to raise the temperature of 100 g of the element by 10oC? (b) If the same amount of heat needed to raise the temperature of 1 g of aluminum by 25oC were applied to 1 g of mercury, by how many degrees would its temperature be raised? (c) If a certain amount of heat is used to raise the temperature of 1.6 g of iron by 10oC, the temperature of 1 g of which element would also be raised by 10oC, using the same amount of heat?arrow_forwardSodium and potassium are both shiny metals in pure form, but corrode rapidly in the presence of oxygen and humidity to form compounds. Does this fact describe a physical or chemical property of these two metals?arrow_forwarda ball has a kinetic energy of 106 J. If the ball is moving at a velocity of 2.51 m/s, what is the mass of the ball, in kilograms?arrow_forward
- Fill in blanks with appropriate words: Blank 1- a system becomes no change, warmer or cooler? Blank 2- undergo a increase, decrease or no change? During an exothermic chemical reaction, a system becomes blank, and the chemical substances undergo a blank, in potential energy.arrow_forwardParticles in the illustration below undergo a chemical change. Which among the remaining boxes, a through d, can represent the products of the chemical change? If a box cannot represent the products of the chemical change, explain why. a b c darrow_forwardTable salt from the beaker on the left in the photograph is added to water, forming the solution on the right of the photo. If you want to separate the mixture, would the distillation apparatus in figure 2-16 or the filtration apparatus in figure 2-17 be the better choice? Explain.arrow_forward
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