The average kinetic energy of water molecules is greatest in which of these samples? *
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Answer:
The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.
Explanation:
Where:
Q = heat absorbed or heat lost
c = specific heat of substance
m = Mass of the substance
ΔT = change in temperature of the substance
We have mass of copper = m = 25.3 g
Specific heat of copper = c = 0.385 J/g°C
ΔT = 39°C - 22°C = 17°C
Heat absorbed by the copper :
The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.
The total pressure of the gas has been 11.9 atm.
The partial pressure has been the pressure exerted by the individual gas in the mixture.
According to the Dalton's law of Partial pressure, the pressure of the gas has been the sum of the partial pressure of each gas in the mixture.
<h3 /><h3>Computation for the pressure of gas</h3>The given gas has partial pressure of Nitrogen,
The partial pressure of Oxygen,
The partial pressure of Argon,
The partial pressure of Helium,
The total pressure, (<em>P</em>) of the gas has been given as:
The total pressure of the gas has been 11.9 atm.
Learn more about the vapor pressure, here: