Thermo (1)
A coffee in a very-high quality thermos bottle is an example of this kind of system, wheras mercury in a thermometer is an example of another kind of system.
What is an isolated and closed system?
(4A.1)
When ammonium nitrate dissolves in water, the vessel gets cold to the touch. This is an example of this kind of process.
What is endothermic?
(4C)
This unit cell has a total occupancy (# of atoms) of 2.
What is body-centered cubic?
The crystal structure of NaCl.
What is Face-Centered Cubic?
Of the two options listed, this has the higher molar heat capacity: N2 at 4000K vs H2 at 300K
What is N2?
(DeDios Exam III Question VII)
The internal energy of a system increased by 982 J when it was supplied with 492 J of energy as heat. This work was done by ... and the amount of work done was ...
What is the environment and 490 J of work?
(4A.?)
This pocket has 4 atoms coordinated to it.
What is a tetrahedral pocket?
These unit cells have atoms that touch along the face diagonal.
What is Face-centered Cubic?
The deltaU of an gas that, while expanding, absorbs 1250 J of heat and does 2.43 kJ of work is...
What is -1.18 kJ or -1180 J?
(Glick Exam III 2021 Question 6a)
At its boiling point, the vaporization of 0.579 mol of CH4(l) requires 4.76 kJ of energy as heat. The enthalpy of vaporization of methane is ...
What is 8.22 kJ/mol?
(4C.7)
Quartz (SiO2); Limestone (CaCO3); dry ice (CO2) and sucrose(C12H22O11) are examples of these types of solids. (Options are ionic, network, metallic, or molecular).
What are network, ionic, molecular, and molecular?
(3G.3)
This substance is lustruous and malleable, has a melting point of 1500 C, and a high electrical conductivity.
What is a metallic substance?
(3G.5)
The heat that must be supplied to a copper kettle of mass 400.0 g containing 300.0 g of water to raise the temperature from 20 C to 100 C is...
What is 112 kJ?
(4B.5 and Glick Exam III Question 6b)
An unknown metal has a mass of 76.6g. When 3695 J of heat are added to the sample, the sample temperature changes by 47.0 C. The specific heat of the unknown metal is...
What is 1.026 J/Cg?
(DeDios Exam III Question VI)
Indium arsenide crystallizes in the zinc-blende structure. The coordination numbers of indium and arsenide, and the formula of the compound are...
What is 4, 4, and InAs?
(3G.23)
The density of rhodium is 12.42 g*cm-3 and its atomic radius is 134 pm. Is the metal close packed or body centered cubic?
What is close packed?
(3G.13)
When 0.338 g of pentane, CH5H12 burns in an excess of oxygen to form carbon dioxide and liquid water in a calorimeter with a heat capacity of 216 J/C. From this reaction, the temperature of the calorimeter rises by 76.7 C. The thermochemical equation of this reaction is... and the deltaH is ...
What is C5H12(l) + 8O2(g) -> 5CO2(g) + 6H2O(l) and -3.54 x 103 kJ?
(Self-test 4D.1B)
The following data given gives this deltaHf for C5H12(g):
deltaHcombustion C5H12(g) = -3537 kJ/mol; deltaHformation CO2(g) = -393.5 kJ/mol; deltaHfomation H2O(l) = -285.8 kJ/mol.
What is -145.3 kJ/mol?
(Glick Exam III Question 8)
The density of vanadium (in a bcc structure) is 6.1 g/cm3. If you changed the structure to fcc, it's density would be...
What is 6.6 g/cm3?
One form of silicon has a density of 2.33 g*cm-3 and crystallizes in a cubic lattice with a unit cell edge of 543 pm. The mass of each unit cell is.
What is 3.73 x 10-22 g/unit cell?
(3G.15)