- #1
missileblitz
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Question #1
How much heat will be lost when 120 g of steam at 100°C is condensed to water at 80°C?
Q = mc∆t
Q = m LV
Q = mc∆t
Q = 0.12 x 4186 x (80 – 100)
Q = 10046.4 J
Q = m LV
Q = 0.12 x (- 2.3 x 106)
Q = 276000 J
= 10046.4 + 276000 = 286046.4
= -2.9 x 105 J
Is the latent heat of condensation negative to that of vaporization?
Question #2
If 20 g of ice at 0° is added to 180 g of water at 22°C, what will the final temperature of the water be?
Q = mc∆t
mc∆t = mc∆t
0.02 x 2050 (0-T) = 0.18 x 4186 (T-22)
-41T = 753.48T - 16576.56
-794.48T = -16576.56
-794.48T/-794.48 = -16576.56/-794.48
T = 20.86
For this question, is the latent heat of fusion needed?
Homework Statement
How much heat will be lost when 120 g of steam at 100°C is condensed to water at 80°C?
Homework Equations
Q = mc∆t
Q = m LV
The Attempt at a Solution
Q = mc∆t
Q = 0.12 x 4186 x (80 – 100)
Q = 10046.4 J
Q = m LV
Q = 0.12 x (- 2.3 x 106)
Q = 276000 J
= 10046.4 + 276000 = 286046.4
= -2.9 x 105 J
Is the latent heat of condensation negative to that of vaporization?
Question #2
Homework Statement
If 20 g of ice at 0° is added to 180 g of water at 22°C, what will the final temperature of the water be?
Homework Equations
Q = mc∆t
The Attempt at a Solution
mc∆t = mc∆t
0.02 x 2050 (0-T) = 0.18 x 4186 (T-22)
-41T = 753.48T - 16576.56
-794.48T = -16576.56
-794.48T/-794.48 = -16576.56/-794.48
T = 20.86
For this question, is the latent heat of fusion needed?
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