Known info:
mass Benzene = 94.4
ΔHfus = 9.8 kj/mol
Specific Heat liquid = Cliq = 1.73 J/g
Specific Heat Solid = Csolid = 1.51 J/g
Temp Melting = 279.0 K
3 Steps
A) q = (mass)(Cliq)(ΔT)
for change in temp use (322- 279), you're going from the highest temp of 322 K to the point the benzene would melt at 279 K
q = (94.4)(1.73)(43)
q = 7022.416 convert to kj = 7.022 kj
B) use q = (n)( ΔHfus)
molar mass = 78.11
convert to moles => 94.4/78.11 = 1.21
q=(1.21)(9.8)
q=11.8 kj
C) q = (mass)(Csolid)(ΔT)
for change in temp here you're going from the melting point to the low temp given. use (279-205)
q = (94.4)(1.51)(74)
q = 10548.256 convert to kj => 10.548 kj
now add all 3 steps together.
A + B + C = final answer
(7.022 kj) + (11.8 kj) + (10.548 kj) = 29.4 kj
A given sample of butane might contain traces of benzene, but pure butane does not.
it decreases
Flame , metal sample
Because you determine the ratio between different elements or isotopes. When one of the elements you are looking at is either added to or removed from your sample, this ratio gets distorted, and you won't be able to make a correct guess of the age of your sample.
Melting point of the sample & Density of the sample
A loss of kinetic energy in the atoms or molecules of a sample of matter will result in the cooling of the sample. That sample will get colder as remove thermal energy from it. The atoms/molecules of a substance have kinetic energy associated with them. This kinetic energy is the result of atomic and/or molecular motion. As a sample of matter cools, the atoms and/or molecules will lose mobility. Loss of mobility and vibrational energy, which are forms of kinetic energy, will become apparent when thermal energy is removed from the sample.
because you have to mix the last sample with it.
1.7293
A given sample of butane might contain traces of benzene, but pure butane does not.
which sample was removed during surgery and sent to pathologist
When a sample of liquid is cooled its thermal energy goes to its surroundings
The average Kinetic energy of the atoms in the sample will increase as the sample is heated.
kinetic energy from translation
the hotter sample because energy flows from hot to cold until the two are the same temperature.
thermal energy or kenetic energy
thermal energy or kenetic energy
10 JoulesConservation of energy, assuming there are no other losses in the system, and 20 Joules are introduced by compression, and 10 Joules are removed by heat transfer, the remaining 10 Joules must be absorbed as increased thermal energy of the gas.