angelinaranee15

03.06.2021 • 

Chemistry

A 55.00 g metal bar is placed into a beaker of boiling water (100.00°C). After three minutes, the bar is removed and placed in a Styrofoam cup calorimeter containing 125.00 g of water. The initial temperature of the water in the cup is 27.00°C. The final temperature of the water and the bar in the cup is 30.20°C. The specific heat of water is 4.18 J/g °C. Calculate ΔT of water in cup?Calculate ΔT of metal bar.Calculate the heat gained by the water.What law allows us to know the Q of the bar?Calculate the specific heat of the bar. * You think the bar is made up of iron. Calculate a % error for specific heat. The actual Cp of iron is 0.448 J/g C.

Ответ:

mestaajtv

27.12.2021

Chemistry

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The volume of gas at STP is 4.3 L.

Explanation:

Given data:

initial temperature of gas = 330 K

Initial pressure = 150 Kpa  (150/101.325 = 1.4804 atm)

Initial volume = 3.5 L

New pressure = 1 atm

New temperature = 273.15 K

New volume = ?

Formula

P₁V₁ / T₁   = P₂V₂ /T₂

Solution:

V₂ =  P₁V₁. T₂  / T₁ .  P₂

V₂ =  1.4804 atm. 3.5 L . 273.15 K / 330 K . 1 atm

V₂ =  1415.3 L / 330

V₂ = 4.3 L

The volume of gas at STP is 4.3 L.

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