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Water, H2O- heat capacity of a solid 0.49 cal/g °C, heat of fusion 80.0 cal/gHeat capacity of liquid 1.00 cal/g° C, heat of vaporization 540 cal/gHeat capacity of gas 0.48 cal/g° C
1. How much heat is needed to warm 45.6 grams water from 23.0° C to 40.0 °C?2. What quantity of heat is involved in changing 23.6 grams of ice at -34.0 °C to ice at 0 °C?3. How much heat is removed to convert 532 grams of water at 0 °C to ice at 0 °C?4. How much heat is released when 57.8 grams steam at 109°C cools to water at 100°C?5. How much heat is required to convert 905 grams of water at 21.0°C to steam at 121 °C?6. How much heat is released when 361 grams of steam at 100°C cools to water at 45.6°C?Aluminum constants- heat of fusion 10.659 J/mole, heat capacity of solid 24.3 J/mol°C, melting point 660.2°C.7. How much heat is needed to warm 5.67 moles aluminum from 22.0 °C to 90 °C?8. How much heat is needed to warm 7.00 moles aluminum from 27.0°C to liquid aluminum to its melting point?9. You are going to use water to cool molten aluminum to the solid state. You have 15.9 grams of molten aluminum at its melting point. If it is cooled to the temperature of 16.0°C, what will the final temperature of the cooling water be if you use 256 grams of water initially at 22.0 °C to cool the aluminum?
How much heat energy would be needed to raise the temperature of a 15.0 g sample of iron (C = 0.448 J/goC) from 22.0 oC to 100.0 oC?
A suitable storage place must be geologically stable long enough for the activity of plutonium-239 to decrease to 0.1% of its original value.
A 1.70-g sample of a large biomolecule was dissolved in 14.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C.
Octane has a density of 0.692 g/mL at 20 degrees Celsius. How many grams of O2 are required to burn 1.00 gal of C8H18?
Ferrocene cannot be nitrated using the conventional HNO3-H2SO4 mixed acid conditions, even though nitration is an electrophilic
Draw the Lewis Structure for the ClF2+ion and AlF4-. For each ion, what are its electron-pair and molecular geometries? What orbitals on Cl and F overlap to form bonds between these elements
Determine how do you find out the new freezing point of a solution if given the formula is Delta T = m x kf x i but how do you find it how does it work?
what is the molarity of HCl in a solution prepaired by dissolving 18.25 gm HCl in 200 gm ethanol, if the density of solution is 0.86 gm per mm
Calculate the [H3O+], pH, and the fraction of dissociation (α) in an aqueous 0.140 M NH3 solution. (Hint: You will need the Ka, located in the back of your textbook.)
The density of liquid oxygen at its boiling point is 1.14 {kg/L} , and its heat of vaporization is 213 {kJ/kg} . How much energy in joules would be absorbed by 2.0 L of liquid oxygen as it vaporized? Express your answer numerically in joules.
The label on an aerosol spray can contains a warning that the can should not be heated to over 130°F because of the danger of explosion due to the pressure increase as it is heated.
A first order reaction has an activation energy of 65.7 kJ/mol and a frequency factor (Arrhenius constant) of 2.36 x 1013 sec -1. Calculate the rate constant at 18 oC
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