One kmol of gaseous octane (C8H18) is ignited with stoichiometric amount of dry air in a closed, rigid vessel. The pressure of the reactants is 1 atm and the temperature is 25C; while the temperature of the products is 727C. Assume “complete” combustion.

(a) Calculate the pressure (atm) of the products.

(b) Determine the heat transfer (kJ/kg fuel) during the reaction.

Answer: (a) 3.42 atm

According to the Fisher model, what are the key determinants of the real rate of interest?

Suppose that the average rate of time preference among economic units increases (i.e. increased preference for current consumption). Use the Fisher model to illustrate how this change would affect the interest rate and the amount of investment in a closed economy. What would happen to current vs. future production (and consumption)?

In construction and accordance with OSHA,

1. Cement blocks (CMU) can be used to level a scaffold frame as long as the block is placed on its side with a scaffold base plate placed firmly on it.

2. For trench and excavation safety, shoring supports should be removed from the bottom up.

3. For trench and excavation safety, closed sheeting must be used in saturated or submerged soil.

Type or paste que

One mole of an ideal gas CP=7R2 in a closed piston/cylinder arrangement is compressed from Ti=200 K , Pi=0.5 MPa to Pf=5 MPa by following paths:.

1. ADIABATIC path
2. ISOTHERMAL path

Calculate ΔU, ΔH, Q and W_EC for both paths.

NOTE: Keep the answers in terms of ‘R’.

stion here

A steam boiler of volume 2.3 m3 initially contained 1.7 m3 liquid water in equilibrium with
0.6 m3 of vapour at 100 kPa. The boiler is heated keeping the inlet and discharge valves closed.
The relief valve is set to lift when the pressure in the boiler reaches
5500 kPa. Determine the amount of heat supplied to the contents in the boiler before the relief
valve lifts.

Leach Inc. experienced the following events for the first two years of its operations:

Year 1:

1. Issued $17,000 of common stock for cash.
2. Provided $85,700 of services on account.
3. Provided $43,000 of services and received cash.
4. Collected $76,000 cash from accounts receivable.
5. Paid $45,000 of salaries expense for the year.
6. Adjusted the accounting records to reflect uncollectible accounts expense for the year. Leach estimates that 4 percent of the ending accounts receivable balance will be uncollectible.
7. Closed the revenue account.
8. Closed the expense account.

Year 2:

1. Wrote off an uncollectible account for $750.
2. Provided $95,000 of services on account.
3. Provided $39,000 of services and collected cash.
4. Collected $88,000 cash from accounts receivable.
5. Paid $72,000 of salaries expense for the year.
6. Adjusted the accounts to reflect uncollectible accounts expense for the year. Leach estimates that 4 percent of the ending accounts receivable balance will be uncollectible.

b. Prepare the income statement, statement of changes in stockholders’ equity, and balance sheet for Year 1. (Balance Sheet only: Items to be deducted must be indicated with a minus sign.)
  

Leach Inc. experienced the following events for the first two years of its operations:

Year 1:

1. Issued $17,000 of common stock for cash.
2. Provided $85,700 of services on account.
3. Provided $43,000 of services and received cash.
4. Collected $76,000 cash from accounts receivable.
5. Paid $45,000 of salaries expense for the year.
6. Adjusted the accounting records to reflect uncollectible accounts expense for the year. Leach estimates that 4 percent of the ending accounts receivable balance will be uncollectible.
7. Closed the revenue account.
8. Closed the expense account.

Year 2:

1. Wrote off an uncollectible account for $750.
2. Provided $95,000 of services on account.
3. Provided $39,000 of services and collected cash.
4. Collected $88,000 cash from accounts receivable.
5. Paid $72,000 of salaries expense for the year.
6. Adjusted the accounts to reflect uncollectible accounts expense for the year. Leach estimates that 4 percent of the ending accounts receivable balance will be uncollectible.

Required:
a. Record the Year 1 events in general journal form and post them to T-accounts. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.)

Closing entries are dated in the journal as of:

a.    the date they are actually journalized, although they are generally prepared after the end of the accounting period        

b.    the last day of the accounting period, although they are actually journalized after the end of the accounting period        

c.    the first day of the accounting period, although they are actually journalized after the end of the accounting period        

d.    the first day of the subsequent accounting period      

Which of the following accounts should be closed to Income Summary at the end of the fiscal year?

a.    Supplies Expense        

b.    Accumulated Depreciation        

c.    Prepaid Insurance        

d.    Unearned Rent      

Which of the following accounts will not be closed to Income Summary at the end of the fiscal year?

a.    Salaries Expense        

b.    Fees Earned        

c.    Unearned Rent        

d.    Depreciation Expense      

A fiscal year:

a.    ordinarily begins on the first day of a month and ends on the last day of the following twelfth month        

b.    for a business is determined by the federal government        

c.    always begins on January 1 and ends on December 31 of the same year        

d.    should end at the height of the business's annual operating cycle      

Closing entries are dated in the journal as of:

a.    the date they are actually journalized, although they are generally prepared after the end of the accounting period        

b.    the last day of the accounting period, although they are actually journalized after the end of the accounting period        

c.    the first day of the accounting period, although they are actually journalized after the end of the accounting period        

d.    the first day of the subsequent accounting period      

Which of the following accounts should be closed to Income Summary at the end of the fiscal year?

a.    Supplies Expense        

b.    Accumulated Depreciation        

c.    Prepaid Insurance        

d.    Unearned Rent      

Which of the following accounts will not be closed to Income Summary at the end of the fiscal year?

a.    Salaries Expense        

b.    Fees Earned        

c.    Unearned Rent        

d.    Depreciation Expense      

A fiscal year:

a.    ordinarily begins on the first day of a month and ends on the last day of the following twelfth month        

b.    for a business is determined by the federal government        

c.    always begins on January 1 and ends on December 31 of the same year        

d.    should end at the height of the business's annual operating cycle