Author Question: The combustion of titanium with oxygen produces titanium dioxide: Ti(s) + O2(g) TiO2(s)When 2.090 g ... (Read 142 times)

pepyto · **on:** Nov 18, 2019

Question 1

What is the enthalpy change (in kJ) of a chemical reaction that raises the temperature of 250.0 mL of solution having a density of 1.25 g mL^-1 by 10.2 °C? (The specific heat of the solution is 3.733 J g^-1 K^-1.)
◦

8.20 kJ

◦

-11.9 kJ

◦

-7.43 kJ

◦

-12.51 kJ

◦

6.51 kJ

Question 2

The combustion of titanium with oxygen produces titanium dioxide:

Ti(s) + O₂(g) → TiO₂(s)

When 2.090 g of titanium is combusted in a bomb calorimeter, the temperature of the calorimeter increases from 25.00 °C to 91.30 °C. In a separate experiment, the heat capacity of the calorimeter is measured to be 9.84 kJ K^-1. The heat of reaction for the combustion of a mole of Ti in this calorimeter is ________ kJ mol^-1.
◦ -3.40
◦ -1.49 × 10⁴
◦ 14.9
◦ 652
◦ -28.5

aloop · **Reply #1 on:** Nov 18, 2019

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