to reach 100°C first? Why? 9.35 A piece of titanium metal with a mass of 20.8 g is heated in boiling water to 99.5°C and then dropped into a coffee cup calorimeter containing 75.0 g of water at 21.7°C. When thermal equilibrium is reached, the final temperature is 24.3°C. Calculate the specific heat capacity of titanium. 9.36 Define the term calibration.
Electronic Effects
The effect of electrons that are located in the chemical bonds within the atoms of the molecule is termed an electronic effect. The electronic effect is also explained as the effect through which the reactivity of the compound in one portion is controlled by the electron repulsion or attraction producing in another portion of the molecule.
Drawing Resonance Forms
In organic chemistry, resonance may be a mental exercise that illustrates the delocalization of electrons inside molecules within the valence bond theory of octet bonding. It entails creating several Lewis structures that, when combined, reflect the molecule's entire electronic structure. One Lewis diagram cannot explain the bonding (lone pair, double bond, octet) elaborately. A hybrid describes a combination of possible resonance structures that represents the entire delocalization of electrons within the molecule.
Using Molecular Structure To Predict Equilibrium
Equilibrium does not always imply an equal presence of reactants and products. This signifies that the reaction reaches a point when reactant and product quantities remain constant as the rate of forward and backward reaction is the same. Molecular structures of various compounds can help in predicting equilibrium.
Answer item 9.35 only.
![9.31 A metal radiator is made from 26.0 kg of iron. The specific heat of iron is 0.449 J/g °C. How much heat
must be supplied to the radiator to raise its temperature from 25.0 to 55.0°C?
9.32 The material typically used to heat metal radiators is water. If a boiler generates water at 79.5°C, what
mass of water was needed to provide the heat required in the previous problem? Water has a specific
heat of 4.184 J/g °C.
9.33 Copper wires used to transport electrical current heat up because of the resistance in the wire. If a,
140-g wire gains 280 J of heat, what is the change in temperature in the wire? Copper has a specific
heat of 0.384 J/g °C.
9.34 A copper nail and an iron nail of the same mass and initially at the same room temperature are both
into a vessel containing boiling water. Which one would you expect to reach 100°C first? Why?
9.35 A piece of titanium metal with a mass of 20.8 g is heated in boiling water to 99.5°C and then dropped
into a coffee cup calorimeter containing 75.0 g of water at 21.7°C. When thermal equilibrium is
reached, the final temperature is 24.3°C. Calculate the specific heat capacity of titanium.
put
9.36 Define the term calibration.
9.37 A calorimeter contained 75.0 g of water at 16.95 C. A 93.3-g sample of iron at 65.58°C was placed in
it, giving a final temperature of 19.68°C for the system. Calculate the heat capacity of the calorimeter.
Specific heats are 4.184 J/g/ C for H,O and 0.444 J/g//C for Fe.
9.38 The energy densities of various types of coal are listed below,
Subbituminous 31 kJ/g
Anthracite 35 kJ/g
Bituminous 28 kJ/g
Lignite 26 kJ/g](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F691f2400-829c-4a67-bca6-2f10857f67a0%2F5e81ff81-418e-4d5f-aa6a-d95f399a3111%2Fmvcss2_processed.jpeg&w=3840&q=75)
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