Iodine, I2, is a solid at room temperature but sublimes (converts from a solid into a gas) when warmed. What is the temperature in a 73.3-mL bulb that contains 0.292 g of I2 vapor at a pressure of 0.462 atm

85.7°C

Explanation:

Step 1:

Data obtained from the question. This include the following:

Volume (V) = 73.3mL = 73.3/1000 = 0.0733L

Mass of l2 = 0.292g

Pressure (P) = 0.462atm

Temperature (T) =..?

Step 2:

Determination of the number of mole present in 0.292g of I2. This is illustrated below:

Mass of l2 = 0.292g

Molar Mass of I2 = 127 x 2 = 254g/mol

Number of mole of I2 =..?

Number of mole = Mass /Molar Mass

Number of mole of I2 = 0.292/254

Number of mole of I2 = 1.15×10¯³ mole

Step 3:

Determination of the temperature.

The temperature in the bulb containing the iodine vapor can be obtained by using the ideal gas equation as follow:

Volume (V) = 0.0733L

Pressure (P) = 0.462atm

Number of mole (n) = 1.15×10¯³ mole

Gas constant (R) = 0.0821 atm.L/Kmol

Temperature (T) =..?

PV = nRT

0.462 x 0.0733 = 1.15×10¯³ x 0.0821 x T

Divide both side by 1.15×10¯³ x 0.0821

T = (0.462 x 0.0733)/(1.15×10¯³ x 0.0821)

T = 358.7K

Converting 358.7K to celsius temperature, we have:

T(°C) = T(K) – 273

T(K) = 358.7K

T(°C) = 358.7 – 273

T(°C) = 85.7°C

Therefore, the temperature is 85.7°C

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

i think its 100

i hope this !