A casting made of cast iron weighs 4.7 kg. The riser and gating system add another 2.5 kg to the total metal poured during the operation. The melting temperature of this grade of cast iron = 1180°C, its density = 7.6 g/cm3, specific heat = 0.46 J/g°C, and heat of fusion = 126 J/g. Assume that the specific heat has the same value for solid and molten metal. Compute (a) the unit energy for melting and pouring and (b) the total energy to heat the metal to a pouring temperature of 1300°C from a starting temperature of 25°C. (c) What is the volume of the casting?

712.5 J/g

5130000 J

618.421052632 cm³

Explanation:

= Specific heat = 0.46 J/g°C

= Change in temperature = (1300-25)°C

= Heat of fusion = 126 J/g

= Density =

Unit energy for melting and pouring is given by

The unit energy for melting and pouring is 712.5 J/g

Total energy is given by

The total energy of the process is 5130000 J

Volume is given by

The volume of the casting is 618.421052632 cm³

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i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!