A house has well insulated walls. It contains a volume of
100m^3 of air at 300 K. Calculate the energy required to incrrease
thetemperature of the diatomic ideal gas by 1 degree C.

Respuesta :

Answer:

The energy required to increase  the temperature of the diatomic ideal gas by 1 degree C is 118.18 kJ.

Explanation:

Given that,

Volume = 100 m³

Temperature = 300 K

Suppose Consider heating it at constant pressure.

We need to calculate the energy required to increase  the temperature of the diatomic ideal gas by 1 degree C

Using formula of heat energy

[tex]Q=nC_{p}\Delta T[/tex]

Where, n = numbers of moles of gas

[tex]C_{p}[/tex] =specific heat capacity

[tex]\Delta T[/tex] = change in temperature

We know that,

The specific heat capacity for diatomic ideal gas

[tex]C_{p}=\dfrac{7R}{2}[/tex]

Put the value into the formula of heat

[tex]Q=\dfrac{7}{2}nR\Delta T[/tex]

Substitute the value of nR into the formula

[tex]Q=\dfrac{7}{2}\dfrac{PV}{T}\tiiems\Delta T[/tex]

Here, P = pressure of the air

V = volume  of the air

Put the value into the formula

[tex]Q=\dfrac{7}{2}\times\dfrac{1.013\times10^5\times100}{300}\times1[/tex]

[tex]Q=118183.3\ J[/tex]

[tex]Q=118.18\ kJ[/tex]

Hence, The energy required to increase  the temperature of the diatomic ideal gas by 1 degree C is 118.18 kJ.