I need help on question’s 11 and 12. Questions 10-12 Somebody has brought a bott

Question

I need help on question’s 11 and 12. Questions 10-12 Somebody has brought a bottle of ice water to class and forgot it. The ice water sits for a long time u becomes room temperature (20.0°C). The initial mass of the ice is 500. g, and the initial mass of the liquid water is 300. g. The latent heat of fusion (freezing/melting) for water is 334 J/g, and the specific heat of liquid water is 4.19 1/(g K). Someone keeps shaking the bottle every minute or so, so the ice water is well-mixed while the ice is melting. 0. While the ice is melting, does the temperature of the ice-water () increase, D) decrease, or (R) remain the same? 11. What quantity of heat is required to melt the ice? 12. What quantity of heat is required to bring the water up to room temperature after the ice has melted? Choices for questions 11 and 12: A. 6.70 x 10*J B. 2.51× 10 C. 2.00 x 106 J D. 1.67 x 105 J E. 1.00 x 105 J F. 4.19 × 10 G. 2.67 x 105 J H Some other value

Explanation / Answer

11] Heat required to melt the ice = Latent heat of fusion

Q = mL = 500 x 334 = 1.67 x 105 J

12] Since the temperature changes in bringing the melted ice to room temperature, the heat required is:

Q' = mc[T' - T] = (300+500)4.17([273+20]-273) = 6.703 x 104 J.

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