Answer:
The sublimation energy
Explanation:
When an ionic solid turns into a gas it is changing from solid state to gas state without going throught liquid state. This process is called sublimation and the energy will be equal to 
Answer:
Explanation:
Charles law states that "the volume of a fixed mass of gas varies directly as its absolute temperature if the pressure is constant".
This law is a derivative of the kinetic molecular theory of gases.
- The law explained shows that as the temperature of gases increases the volume of gases increases.
- When gases are heated the average kinetic energy of the molecules increases.
- The molecules are independent of one another and they begin to expand out as their velocity surges.
- They take up more spaces in this way.
Answer:
0.00331M
Explanation:
Molarity of a solution can be calculated as follows:
Molarity = number of moles (n) ÷ volume (V)
In the information provided in this question, the volume = 502mL = 502/1000 = 0.502L, mass of caffeine = 0.322g
Molar mass of caffeine (C8H10N4O2), where C = 12, H = 1, N = 14, O = 16 is as follows:
Molar mass = 12(8) + 1(10) + 14(4) + 16(2)
= 96 + 10 + 56 + 32
= 194g/mol
Using, moles = mass/molar mass
moles = 0.322/194
moles = 1.66 × 10-³ moles
mole = 0.00166mol
Molarity = number of moles ÷ volume
Molarity = 0.00166mol ÷ 0.502L
Molarity = 0.00331M.
Limitations of word equation and formula equation is that they do not express the quantities of reactant and product in the reaction.
Explanation:
Word equation expresses the chemical reaction in words. The reactants products and the direction of the reaction is mentioned in it. The information is used to write a chemical reaction. The word "reacted' shows the reactants and 'forms' show product. The sequence of reactions, moles of reactant and product is written.
Limitations:
Rate of reaction cannot be known.
Actual amount of product formed cannot be known.
eg: Addition of sodium oxide with water produces sodium hydroxide.
In formula equation symbols for element representation are used. The ratio of the elements in the reaction are also there. The atom numbers are indicated by the subscript number.
Limitations:
Concentration of both reactants and products is not mentioned.
The physical conditions of the reactants are not told
The thermodynamic conditions are not expressed as rate of reaction, pressure and temperature requirement.
Time taken to complete the reaction cannot be known.
Reaction mechanism cannot be observed by only chemical equations.
Value of actual yield is not given.
Answer:
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Explanation:
i hope you find this answer
