Boil the kettle at your home. Determine the following b) Time required to boil the water from some initial temperature to boiling temperature of 100 C?
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Q: Question 37
A:
Boil the kettle at your home. Determine the following
b) Time required to boil the water from some initial temperature to boiling temperature of 100 C?
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- 4) A ground source heat pump heats a building by extracting heat from the ground and pumping it into the building. Define: Qc = heat extracted from the ground, Qn= heat pumped into the building, W = electric energy used by the heat pump, Tc= temperature of the ground, T = temperature of building (Qc, Qn, and W are positive by definition). Assume Tr > Tc. a) Draw a diagram showing energy flow in and out of the heat pump. b) Write a general expression for the change AS in the entropy of the "universe", that is the heat pump plus the cold and hot reservoirs, in terms of the quantities defined above. Now assume ideal (reversible) operation, and take Te= 10 °C and Tp= 20 °C. What is the coefficient of performance (ČOP) of the heat pump? By what factor would this change if we had Tc = 0 °C instead?A 0.065-kg ice cube at -30.0°C is placed in 0.375 kg of 35.0°C water in a very well-insulated container. The latent heat of fusion for water is Lf = 79.8 kcal/kg Chart attached. What is the final temperature of the water, in degrees Celsius?A) If the final temperature is 22.1°C, what is the specific heat of the object? (2 sig fig) B) Referring to the table, identify the material in the object
- I need help with this question17.1 kg water in the pond turns to ice in that he 2. a). How much energy is given to your body when 0.4 kg of steam condenses on your skin? b). If the same amount of energy were used to warm 4 kg of water( which is ten times the amount of steam) initially at 0 deg Celsius, what would be the final temperature of the water in deg C and c) in deg F? * 3. The heat of vaporization of ethyl alcohol is 8.5 x 10^5 J/kg. If 2 kg of it od 07 were allowed to vaporize in a refrigerator, how much energy would be drawn from the air molecules? *A 2.00-kg block of copper at 22.0°C is dropped into a large vessel of liquid nitrogen at 77.3 K. How many kilograms of nitrogen boil away by the time the copper reaches 77.3 K? (The specific heat of copper is 0.092 0 cal/g °C, and the latent heat of vaporization of nitrogen is 48.0 cal/g.) kg Need Help? Read It Watch It
- AàA(n) 80-g ice cube at 0°C is placed in 990 g of water at 22°C. What is the final temperature of the mixture? °CA 1.50-kg iron horseshoe initially at 590°C is dropped into a bucket containing 25.0 kg of water at 28.0°C. What is the final temperature of the water-horseshoe system? Ignore the heat capacity of the container and assume a negligible amount of water boils away. °C Need Help? Master It Read It