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Suppose a heat engine absorbs 10.0 kJ of heat from a high-temperature source at THot= 450 K and discards heatto a low-temperature reservoir at TCold=350 K.
Calculate the probability of a spontaneous compression of 1.00 moleof gas by 0.01% - that is, the probability that all the moleculeswill be found in a volume V'=0.9999V at a certain time.
A well-insulated ice-water bath at 0 degrees C C contains 20 g ice.Throughout this experiment, the bath is maintained at the constant pressure of 1 atm. When a piece of nickel at 100 degrees C isdr
Nitrogen gas (N2) reactswith hydrogen gas (H2) to form ammonia (NH3)at 200°C in a closed container. 1.02atm of nitrogen gas is mixed with 2.00 atmof hydrogen gas.
What is the half-life in minutes of a compound if 75.0 percentof a given sample decompose in 15.0 minutes? Assume first-order kinetics.
When a pure sample of tert-butyl bromide is analyzed by gas chromatography, two components are usually observed. One of them istert-butyl bromide, the other one is a decomposition product.
In a calorimeter, 50 ml of 60.0 degrees celsius water is added to 50 ml of 14 degree celsius water. If the maximium temperature was determined to be 36.0 degree celsius, calculate the heat capacity
If 50.0ml of 10.0 degree celsius is added to 40 ml of 65 degrees celsius, calculate the final temperature of the mixture assuming no heat is lost to the surrounding, including the container.
A student left some alkyl halides (RCl and RBr) in an open container for several minutes. What happened to the composition of the halide mixture at that time? Assumes that some liquid remainsin the
If a chemical reaction is carried out in a calorimeter containing 115 mL of water solution and the temperature is observed to rise from an initial value of 23.2 degrees C to 26.
The unit cell edge of a substance (1 monatomic cation:1 monatomicanion) having a crystal lattice identical to that of sodiumchloride has a length of 574.3 pm. The cation of the substance hasa radius
Mercury poisoning is a debilitating disease that is oftenfatal. In the human body, mercury reacts with essentialenzymes leading to irreversible inactivity of these enzymes.
An x-ray diffraction scan (λ=2.291 Angstroms (A)) shows a diffraction peak at θ=11.3 degrees for the atomic planes (1,2,1) or (121). What is the lattice parameter of the crystal?
The heat energy required to melt 1.00 g of ice at 0°C is 333 J.If one ice cube has a mass of 67.0 g,and a tray contains 16 ice cubes, what quantity of energy is required to melt a tray of ice cu
What is the molality of carbon tetrachloride (CCl4, MW = 153.8g/mol) in a solution with toluene (C6H5CH3, MW = 92 g/mol), given that the mole fraction of CCl4 in the solution is 0.200?
How much heat energy, in joules, is required to raise the temperature of 446 g of tin from room temperature, 24.5°C, to its melting point, 231.9° C, and then melt the tin at that temperature
The freezing point of mercury is -38.8°C, is the only metal that is liquid at room temperature. What quantity of heat energy,in joules, must be released by mercury if 1.20 mL of mercury is coole
Chloromethane, CH3Cl, arises from the oceans and frommicrobial fermentation and is found throughout the environment. Itis used in the manufacture of various chemicals and has been usedas a topical
A unit cell of the cubic system has two atoms of an element Ainside the cell and eight atoms of A at the corners of the cell.There are eight atoms of B along the edges of the cell and fouratoms of B
Calculate the number of Frenkel defects per cubic meter in silverchloride at 326 oC. The energy for defect formation is1.1 eV, while the density for AgCl is 5.5 g/cm3 at this temperature.
A 500.0-mL sodium iodine (Nal) solution wasprepared by dissolving 36.7 grams of solid Nal in water. chlorinegas was bubbled through a 100-0-mL sample of this solution until the reaction was complete
2 moles of a compound are allowed to react ina foam coffee cup that contains 113 grams of water. There action caused the temperature of the water to rise from 21 to24.7 degrees Celsius.
251.0 g of hot water at 96.0 °C are placed in a 0.2000 kg mug at 20.0 °C. The specific heat of the water is 4.00 J/g °C, while that of the mug is 0.80 J/g °C.
A parsec is the distance light travels in 3.26 years. Given the velocity of light is 186282 mile/sec, how many kilometers does light travel in 5 parsecs?
In vacuum distillation, why is it important that heating of the flask is begun only after the system is evacuated to the desired pressure?