Question

.72 g of a solid fuel containing 80% carbon when burnt in a bomb calorimeter increased temperature of water from 27.3oc to 29.1oc if calorimeter contain 250gm of water and its water equivalent is 150gm calculate the HCV of saple

Answer 1

Answer:

Answer is hcv=1000kcal/kg(or)4200kj/kg

Answer 2

Given:

• Weight of solid fuel = 0.72 g
• Weight of water = 250 g
• Water equivalent = 150 g

• Temperature 1 = 27.3° C

• Temperature 2 = 29.1° C

To Find:

• The HCV of the sample.

Solution:

The formula to find HCV is given by,

HCV = $\frac{(W+w)(t_2-t_1)}{m}$  → {equation 1}

where "W" is the weight of water, "w" is water equivalent water, "m" is the weight of solid fuel, "$t_2$ and $t_1$" temperatures.

Substitute the values from the given data in equation 1. we get,

⇒ HCV = $\frac{(250+150)(29.1-27.3)}{0.72}$ = $\frac{(400)(1.8)}{0.72}$

In the above equation, we solved the terms in brackets in the numerator and then multiplied them.

⇒ HCV = 720/0.72 { dividing the terms}

⇒ HCV = 1000 kcal/Kg

∴ The value of HCV = 1000 kcal/Kg.