My No How much heat in joules is needed to raise the temperature of 3.0 L of wat

Question

My No How much heat in joules is needed to raise the temperature of 3.0 L of water from 0°C to 78.0°c? (Hint: Recall the original definition of the liter) Need Help? Readn 11. O-/1 points ShipPS14 5.E.018. My No A quantity of steam (900 g) at 113°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed? kcal Need Help? 12 0- points ShippS14 5.E.022. My Not A cylinder of gas at room temperature (20°C) has a pressure p1. To what temperature in degrees Celsius would the temperature have to be increased for th 1.2p1? °C

Explanation / Answer

10. Q = m C deltaT

Q = (3 kg) (4184 J/ kg deg C) (78 - 0)

Q = 9.79 x 10^5 J  

11. Q1 = (0.900) (2108)(113 - 100) = 24663.6 J

Q2 = m Lv = (0.9) (2260 x 10^3) = 2034 x 10^3 J

Q3 = (0.9 ) (4184) (100) = 376560 J

Q4 = m Lf = (0.9) (334 x 10^3) = 300.6 x 10^3 J

Q = Q1 + q@ + q3 + Q4 = 2.74 x 10^6 J

= 653.9 kcal

12. p1 / T1 = p2 / T2

T2 = 1.2(273 + 20) = 351.6 K  

T2 = 78.6 deg C

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