Question

If 1.45 L of water has an initial temperature of 25.0 C, what is its final temperature be after absorption of 9.4 X 10^22 kWh of heat?

Answer 1

84735 Chemistry, Other

If 1.45 L of water has an initial temperature of 25.0 C, what is its final temperature be after absorption of 9.4 x 10^{-2} kWh of heat?

Answer:

Cp (H₂O) = 4.184 J/ g C

9.4 X 10^{-2} kWh = 9.4 X 10^{-2} kJh/s (3600 s / 1 hr) (1000 J / 1 kJ) = = 338400 J

H = m x Cp x ΔT

where H is the heat;

m is the mass;

Cp is the heat capacity;

ΔT is the change in temperature.

338400 J = (1.45 L) x (1000 g / L) x (4.184 J/ g C) x ΔT

ΔT = 55.78 C

Therefore, the new temperature is T = 55.78 C + 25 CT = 80.78 C.

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