Author Question: The temperature rises from 25.00 C to 29.00 C in a bomb calorimeter when 3.50 g of sucrose undergoes ... (Read 72 times)

Zoey63294 · **on:** Aug 27, 2018

The temperature rises from 25.00 C to 29.00 C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter.

Calculate Erxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/C . The molar mass of sugar is 342.3 g/mol.
A) - 1.92 103 kJ/mole
B) 1.92 103 kJ/mole
C) - 1.23 103 kJ/mole
D) 2.35 104 kJ/mole

Question 2

All of the statements concerning citric acid are true except

A) it contains three carboxylic acid groups because its carbon skeleton is branched.
B) it is very soluble in water.
C) its salts are used in many consumer products.
D) it is produced only by plants.
E) it is a weak acid.