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Physical Chemistry
Which of these three metals, when made into a cooking pot, will keep water warm the longest when the pot is removed from the stove? Why?
(Assume that the mass of each pot, the initial temperature of the water, the amount of water, and the rate of heat loss to the surroundings are the same for all three metals.) the changes are different because the specific heats of the metals are different.
(Assume that the mass of each pot, the initial temperature of the water, the amount of water, and the rate of heat loss to the surroundings are the same for all three metals.) the changes are different because the specific heats of the metals are different.
Physical Chemistry
An experiment is performed where a 72.6 g piece of titanium metal is heated to 98.2°C. The titanium is then quickly transferred into 100.0 mL of calorimeter water at 23.5°C. The final temperature of the mixture in the calorimeter reaches 29.4°C.
a. List two assumptions that you would have to make in order to calculate the specific heat capacity of titanium.
a. List two assumptions that you would have to make in order to calculate the specific heat capacity of titanium.
Physical Chemistry
To make a thin film of SiO2 in a vacuum chamber, you start with 1.00 mm x 1.00 mm piec of Mo metal as the substrate to build your film on. The first step of the process is to put down a 0.010 mm thick film of Si atoms onto the piece of Mo metal. This Si film has a density of 8.41 x 10^22 atoms/mL. The next step is to oxidize the film with O2 gas. You need two Oxygen atoms for every one silicon atom you have in the film. How many O atoms do you need to make the SiO2 film?
b) This process in only 20. % efficient (meaning 1 atom in 5 react). What is the minimum number of O atoms you need to make the SiO2 film?
c) If there are 1.4 x 10^22 O2 molecules/mL of gas, how many L do you need?
b) This process in only 20. % efficient (meaning 1 atom in 5 react). What is the minimum number of O atoms you need to make the SiO2 film?
c) If there are 1.4 x 10^22 O2 molecules/mL of gas, how many L do you need?
Physical Chemistry
Write the values of four quantum numbers for 3d electrons?
Physical Chemistry
The active mass of 7g of nitrogen in 2 litre container would be
Physical Chemistry
Why is change in internal energy positive for a child in the growth period?
Physical Chemistry
how are freeze dried foods prepared
Physical Chemistry
(1) give the name and symbol of si unites of molar mass
(2) express 2 cm3 in m3 units
(2) express 2 cm3 in m3 units
Physical Chemistry
Using suitable diagram,discuss the mutual solubilities of components of the following liquid pairs which have
(1) lower critical solution temperature,
(2) upper critical solution tempurature , and
(3) both upper and lower critical solution tempuratures
(1) lower critical solution temperature,
(2) upper critical solution tempurature , and
(3) both upper and lower critical solution tempuratures
Physical Chemistry
Discuss various factors affecting the solubility of a gas in liquid.
