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Chemistry

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Isidro O'Keefe

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Cards in this guide (18)
When your body breaks down sugar completely how much heat is released compared to burning the same amount of sugar in a flame

The body releases the same amount of heat.

How many moles of iron can be produced from the reaction of 10 mol Fe2O3 and 25 mol of CO

17

What is the difference between saturated and unsaturated hydrocarbons

A saturated hydrocarbon is one where all the carbon atoms are bonded to four other atoms. An unsaturated hydrocarbon is one where some of the carbon atoms aren't (an example being an alkene due to the carbon carbon double bond).

Energy change from one form to another

it is a law of conservation of energy

i.e., one form of energy can be changed to another form of energy wothout any loss of energy....

On what principle does calorimetry depends

law of conservation of energy.

Convert 6.5kcal to Joules

1 cal ~ 4.18 J <-- known

6.5 kcal = 6500 cal = 4.18 [J / cal] * 6500 [cal] = 27170 [J] or 2.72e+4 [J]

How does nuclear fission differ from nuclear fusion

Nuclear fission is the process of splitting a nucleus with a large mass into two nuclei with smaller masses. The energy released can then be used to produce electricity. Nuclear fusion is the process of merging nuclei with smaller masses into a nucleus with a larger mass. The energy released by this reaction may someday be used to produce electricity. In other words, Nuclear Fusion is the exact opposite of Nuclear fission. While Nuclear Fission is splitting a nucleus into two nuclei, nuclear fusion is merging two nuclei into a nucleus.

It is a mixture that has the same composition throughout

A mixture that has the same composition throughout is known as a homogeneous mixture. In a heterogeneous mixture there are localized regions with different properties.

What is the quantity of heat in joules or calories required to raise the temperature of 1 gram of a substance 1C

specific heat(;

your welcome!

What is coppers specific heat

The specific heat of copper is 0.093 cal/g(C°) or 390 J/kg(C°).

How is endothermic reactions differ from exothermic reactions

Endothermic chemical reactions absorb more energy than they release, while exothermic chemical reactions release more energy than they absorb.

Daltons model of an atom is best described as

It was commonly described as a Solid sphere

Does exothermic process absorb heat

No

An Endothermic Process absorbs heat.

An Exothermic Process releases heat.

What does a negative H tell about a reaction

The reaction is exothermic.

What is the specific capacity of water

At 20°C the specific heat capacity of water is 4.183 J/g °C or 4.183 J/gK.

What particle was observed in the cathode rays

The negatively charged particle called electron.

Which mathematical statement correctly relates qsys and qsurr

q sys = -q surr

What shows that the formation of CO 2 releases 393.5 kJ mol

C(s) + O2(g) + CO2(g) + 393.5 kJ

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