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A Carnot refrigerator requires 1.1 kw per tome of refrigeration to maintain a region at
m'/kg respectively.
a low temperature of -30°C. Determine
a. COP of refrigerator
b. Higher temperature of the cycle
c. Heat rejected in KJ/ton
d. Calculate the heat delivered and COP, when this device is used as heat pump.
Given the balanced equation below for the highly exothermic reaction of aluminum
with oxygen to form aluminum oxide:
4Al(s) + 3O2(g) 2Al2O3(s) ∆H = - 1,670 kJ
a. What is the value of ∆H when 2 moles of aluminum react?
b. What is the value of ∆H when 10.8 g of aluminum reacts?
c. A certain reaction releases 6,881 kJ of heat. What mass of aluminum oxide was
produced in the reaction?
Why it's so difficult to localize sound with only one ear? How does having two ears help to localize sound?
Given the formula for change in internal energy, U = Q + W, calculate work for a
system that absorbs 350 kJ of heat and for which U = 150 kJ. Is the work done on
the system or by the system? Does the system expand or contract?
An employee of a big business company earns a gross annual salary of
₱450,000. What is the weekly, and monthly pay for this employee?
A sample biogas contains 10.75 mol ethane, 6.35 mol pentane and 2.89 mol propane. If the total pressure I 2. 46 atm, What are the partial pressures of the gases?
Input:1good23morning456
Output: goodmorning 123456
Explanation:given a string, write a program to remove all the numbers in it to its end.
1. What is the boiling point and freezing point of a solution containing 6 g of
glycerol (C3H8O3) in 25 g of water?
2. What is the molecular mass of a solute in a solution containing 3.8 g of
nonelectrolyte in 420 g of water which freezes at -23 oC?
Input: Tea is good for you
3
Output:is good
Explanation: given a string write a program to remove all the words with k length.
Identify what colligative property is applied or observed in the following. Explain
your answer.
1. Salt is mixed with ice in ice cream making.
2. Salt and sugar are used in food preservation.
3. Coolant is added to car radiators.
4. Pressure cooker.
5. Pruned or wrinkled fingers.
#340153 on Dec 2023