An iron block of mass 18 kg is heated from 285 k to 318 k. if 267.3 kj is required, what is the specific heat of iron? a. 450.00 b. 145.80 c. 158.77 d. 490.05
i am looking for an abc or d not a long list of explanations

Explanation:

1) Data:

a) m = 18 kg

b) T₁ = 285 K

c) T₂ = 318 K

d) Q = 267.3 kJ

e) S = ?

2) Principles and equations

The specific heat of a substance is the amount of heat energy absorbed to increase the temperature of certain amount (gram, kg, or moles, depending on the definition or units) of the substance in 1 ° C or 1 K.

The mathematical relation between the specific heat and the heat energy absorbed is:

Where,

3) Solution:

a) Substitute the data into the equation:

b) Solve for S and compute:

The options have not units, but I notice that the first answer is 1,000 times the answer I obtained, so I will make a conversion of units.

c) Convert to J /( kg . k):

Now we can see that the option A is is the answer, assuming the units.

lithosphere and asthenosphere

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.