A poorly ventilated commercial kitchen contains 120 kg of air at a temperature of 19°C and...

A poorly ventilated commercial kitchen contains 120 kg of air at a temperature of 19°C and and with a relative humidity of 30% at the start of the evening shift. At the end of the shift the temperature in the kitchen is 28°C and water is condensing on the walls and ceilings. What is the minimum amount of water vapour that has been added to the air in the kitchen over the course of the shift? (to 2 s.f and in kg)

Expert Solution

KINDLY RATE THE ANSWER

genius_generous answered 2 years ago

The inside temperature of a wall in a dwelling is 19°C. If the air in the...

The inside temperature of a wall in a dwelling is 19°C. If the air in the room is at 21°C, what is the maximum relative humidity, in percent, the air can have before condensation occurs on the wall?

The air, which has a temperature of 120 ° C, flows over a plate with a...

The air, which has a temperature of 120 ° C, flows over a plate with a length of 1.2 m and a constant temperature of 30 ° C across the surface, and its speed flows at a speed of 2 m / s. According to this, a.) Calculate the speed and temperature boundary layer thickness at the end of the plate. b.) Find the local heat transfer coefficient and heat flux at the end of the plate. c.) Find the...

A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C...

A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C and 100 kPa total pressure. Determine (a) The specific humidity (b) The relative humidity (c) The specific enthalpy of the mixture in the tank as (kJ/kg-mixture) (calculate by hand) (d) The specific enthalpy of the mixture in the tank as (kJ/kg-dry air) (calculate by hand) (e) Explain (in 1-2 sentences) the difference between the values in c and d – which value agrees with...

A mass of 0.07 kg of air at a temperature of 30°C and pressure 100 kPa...

A mass of 0.07 kg of air at a temperature of 30°C and pressure 100 kPa is compressed to a pressure of 600 kPa, according to the law: (i.e. Polytropic process, n=1.3). Determine: i.The final volume ii.The final temperature iii.The work transfer iv.The change in internal energy v.The heat transfer

3. An insulated container contains 2.7 kg of steam at 1.4 bar and 120°C. The top...

3. An insulated container contains 2.7 kg of steam at 1.4 bar and 120°C. The top is opened and a 1.8 kg block of ice at 0°C and 4.5 kg of liquid water at 1.6°C are dumped into the container. What is the final temperature of the resulting vapor-liquid mixture in the container? Note: It takes 6.0095 KJ/mol to melt ice.

An adiabatic tank contains 120 kg of liquid water initially at 70 °C. The water within...

An adiabatic tank contains 120 kg of liquid water initially at 70 °C. The water within the tank is utilized to quench (cool) a 15 kg steel block initially at 300 °C. The steel block is dropped into the tank, and after some time the steel block and the water in the tank reach thermal equilibrium. Determine the total entropy change during the quenching process. Specific heat of steel : Csteel= 0.50 kJ/kg*K. Specific heat of water : Cwater= 4.18...

A spring loaded piston cylinder contains 1.5 kg of air at 27°C and 160 kPa. It...

A spring loaded piston cylinder contains 1.5 kg of air at 27°C and 160 kPa. It is now heated in a process where pressure is linear in volume, P = A + BV, to twice the initial volume where it reaches 900 K. Find the work, the heat transfer and the total entropy generation assuming a source at 900 K. Is this a possible process?

A 120 cm3 box contains helium at a pressure of 2.10 atm and a temperature of...

A 120 cm3 box contains helium at a pressure of 2.10 atm and a temperature of 100 ∘C. It is placed in thermal contact with a 210 cm3 box containing argon at a pressure of 4.00 atm and a temperature of 390 ∘C. What is the final thermal energy of each gas? How much heat energy is transferred, and in which direction? What is the final temperature? What is the final pressure in each box?

A piston?cylinder device initially contains 1.5?kg saturated liquid water at 120°C. Now heat is transferred to...

A piston?cylinder device initially contains 1.5?kg saturated liquid water at 120°C. Now heat is transferred to the water until the volume increases 100 times. Determine: a. Initial Volume of the water. b. Final volume of water. c. Final state of water. d. Amount of heat added to the water e. Draw the T?s diagram

Air enters a counter-flow drier at 70˚C dry bulb temperature and 20˚C dew point temperature. Air...

Air enters a counter-flow drier at 70˚C dry bulb temperature and 20˚C dew point temperature. Air leaves the drier at 40˚C and 60% relative humidity. The initial moisture content of the product is 82% (wet basis). The amount of air moving through the drier is 2000kg of dry air per hour. The mass flow rate of the product is 10kg dry solid per hour. What is the final moisture content of the dried product in wet basis?

Question