The heating cost in $ million (btu) and $ MJ for a propane-fired water heater should be calculated with efficiency 80% of the standard heat of combustion of the propane at 25 o C and products as carbon dioxide and water in gas. If price of propane is given as $2 .20 gallon at 25 o C . Concept Introduction: The standard heat of combustion can be calculated as: Δ H ∘ f = Δ H ∘ P − Δ H ∘ R ........ (1) And generalize correlations for V l in liquids: V l i q = V c Z c ( 1 − T r ) 2 / 7 .......(2) And for rest problem, the concept used in this problem is based on unit consistency. The given values are used to balance the unit for unknown value which is $ million (btu) and $ MJ .

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Chapter 4, Problem 4.48P

Interpretation Introduction

Interpretation:

The heating cost in $million (btu) and $MJ for a propane-fired water heater should be calculated with efficiency 80% of the standard heat of combustion of the propane at 25oC and products as carbon dioxide and water in gas. If price of propane is given as $2.20gallon at 25oC .

Concept Introduction:

The standard heat of combustion can be calculated as:

ΔH∘f=ΔH∘P−ΔH∘R........ (1)

And generalize correlations for Vl in liquids:

Vliq=VcZc(1−Tr)2/7.......(2)

And for rest problem, the concept used in this problem is based on unit consistency. The given values are used to balance the unit for unknown value which is $million (btu) and $MJ .

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