Calculate the Energy in the Form of Heat (In KJ)required $\circ$

question 46

Multiple Choice

Calculate the energy in the form of heat (in kJ) required to change 71.8 g of liquid water at 25.7 ^$\circ$ C to ice at -16.1 ^$\circ$ C.Assume that no energy in the form of heat is transferred to the environment.(Heat of fusion = 333 J/g; heat of vaporization = 2256 J/g; specific heat capacities: ice = 2.06 J/g.K,liquid water = 4.184 J/g.K)

• A) -12.6 kJ
• B) -7.7 kJ
• C) -34.0kJ
• D) -31.6 kJ
• E) -10.1 kJ

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Definitions:

Direct Materials

Raw materials that can be directly attributed to the production process of a specific product.

Direct Labor

The cost associated with the work of employees directly involved in the production of goods or services.

Departmental Overhead Rate Method

A costing method that calculates different overhead rates for each department within a factory, based on each department's specific operational costs.

Overhead Rate

A calculation used to allocate indirect costs to produced goods based on a certain measure, like labor hours or machine hours.