ThermochemistryHard

Question

Assume that for a domestic hot water supply, 160 kg of water per day must be heated from 10oC to 60oC and gaseous fuel propane, C3H8, is used for this purpose. What volume of propane gas at STP would have to be used for heating domestic water, with efficiency of 40%? Heat of combustion of propane is −500 kcal/mol and specific heat capacity of water is 1.0 cal/K-g.

Options

A.896 L
B.908 L
C.896 m3
D.908 m3

Solution

Heat liberated from propane = Heat absorbed by water

Or, $n \times 500 \times 10^{3} \times \frac{40}{100} = 160 \times 10^{3} \times 1 \times 50 \Rightarrow n = 40$

Create a free account to view solution

View Solution Free
Topic: Thermochemistry·Practice all Thermochemistry questions

More Thermochemistry Questions

The heat of combustion of yellow phosphorous is - 9.91 kJ and of red phosphorous to redphosphorus is :...A solution of 500 ml of 2 M-KOH is added to 500 ml of 2 M-HCl and the mixture is well shaken. The rise in temperature T1...Determine enthalpy of formation for H2O2 (l), using the listed enthalpies of reactions :N2H4 (l) + 2H2O2 (l) → N2 ...The standard enthalpy of combustion of solid boron is numerically equal to...Which of the following is/are endothermic compound(s)?...