Calculate the standard enthalpy change deltaho for the

Question

Review the following Youtube video: https://www.youtube.com/watch?v=_NLAgSnqNOE

1. Calculate the standard enthalpy change, ΔH^o, for the formation of 1 mol of strontium carbonate (the material that gives the red color in fireworks) from its elements.

Sr (s) + C(graphite) + 3/2 O₂(g) →  SrCo₃

The information n available is-

(1) Sr (s) + ½ O₂(g) → SrO(s)              ΔH^o = -592 kJ

(2) SrO (s) CO₂ (g) → SrCO₃(s)           ΔH^o = -234 kJ

(3) C(graphite) + O₂(g) → CO₂(g)        ΔH^o = -394 kJ

2. The combination of coke and steam produces a mixture called coal gas, which can be used as a fuel or as a starting material for other reactions.  If we assume coke can be represented by graphite, the equation for the production of coal gas is

2 C(s) + 2 H₂O(g) → CH₄(g) + CO₂(g)

Determine the standard enthalpy change for this reaction from the following standard enthalpies of reaction:

(1) C(s) + H₂O(g) → CO(g) + H₂(g)                 ΔH^o = 131.3 kJ

(2) CO(g) + H₂O(g) → CO₂(g) + H₂(g)            ΔH^o = -41.2 kJ

(3) CH₄(g) + H₂O(g) → 3H₂(g) + CO(g)          ΔH^o = 206.1 kJ

3.  The enthalpy change due to a temperature change is a change in

A. kinetic energy.

B. potential energy.

4.  An enthalpy change at constant temperature and pressure is designated by the symbol

A. q

B. H

C. _H

D. c

5. The molar enthalpy change for a process is designated by the symbol

A. q

B. H

C. DH

D. c

6. Another word for melting is _______________.

7. Another word for boiling is _______________.

8. Calculate the enthalpy change when a 10.0 g of water is heated from 10.0°C to 25.0°C. Show working.

9. Calculate the enthalpy change when 10.0 g of water at 100°C is converted to 10.0 g of Vapor at 100°C. Show work.

10. Calculate the total change in enthalpy when 100 g of ice at -5.00°C is converted to water at 85.00°C. Show work.