# Chem 2 enthalpy

posted by .

How much heat is evolved when 25.5 g of benzene freezes at 5.5 Celcius (molar heat of fusion is 9.94 kJ/mol and molar mass of benzene= 78.0 g/mol)

• Chem 2 enthalpy -

q = mass x delta Hfusion.
Change 25.5 g to moles. moles = grams/molar mass.

Note the correct spelling of celsius.

## Similar Questions

1. ### Chemistry

Calculate the number of joules required to melt 57.4g of benzene at 5.5 degrees celsius?
2. ### Chemistry

How many grams of steam at 100 degrees celcuis would be required to raise the temperature of 35.8 g solid benzene (C6H6) from 5.5 - 45.0 degrees celcius. (the melting point of benzene is 5.5 degrees celcius, delta H fusion for benzene …
3. ### Chemistry

How much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C?
4. ### Chemistry

Calculate the heat (in kJ) required to transform 58.60 g of dinitrogen tetraoxide from a solid at a temperature of -9.3 °C to a gas at 47 °C. Report your answer to one decimal place. Data: Molar mass of dinitrogen tetraoxide, N2O4 …
5. ### chemisty

The molar heat capacity of C6H6(ℓ) is 136 J/mol ·◦C and of C6H6(g) is 81.6 J/mol · ◦C. The molar heat of fusion for benzene is 9.92 kJ/mol and its molar heat of vaporization is 30.8 kJ/mol. The melting point of …
6. ### Chem (Thermodynamics)

The standard molar enthalpy of fusion and the standard molar enthalpy of vaporization of benzene are 10.9 kJ/mol and 31.0 kJ/mol, respectively. Calculate the standard molar entropy changes for the solid ↔ liquid and liquid ↔ …
7. ### Chem

How many kilojoules of heat are released when 185 g of benzene freezes at its freezing/melting point?
8. ### chemistry

The molar heat of fusion of benzene is 9930 J/mol and ∆s= 35.7 j/mol-deg. Calculate the melting point.
9. ### Chem1412

The melting point of benzene (C6H6) is 5.5 oC and the heat of fusion at that temperature is 9.87 kJ/mol. How much heat would be required to melt 35.0 g of benzene at 5.5 oC?
10. ### AP Chem

Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure of benzene at 29◦C?

More Similar Questions