Question

Hi im really confused:

Answer 1

The energy required to raise the temperature of the air in a room by 5.0°C is 336 kJ

U =  $c_{p}$ m ΔT

U = Energy

$c_{p}$ = Specific heat

m = Mass

ΔT = Change in temperature

ρ = Density

V = Volume

ρ = 1000 g / m³ (Dry air )

$c_{p}$ = 1 J / g K

ΔT = 5 °C

V = 4 * 4 * 3

V = 48 m³

m = ρ V

m = 1000 * 48

m = 48000 g

U = 1 * 48000 * 7

U = 336000 J

U = 336 kJ

Therefore, the energy required to raise the temperature of the air in a room by 5.0°C is 336 kJ

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