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Thermodynamics deals with the concepts of heat and temperature and the inter-conversion of heat and other forms of energy. The four laws of thermodynamics govern the behavior of these quantities and provide a quantitative description.
A sample of iron receives 50J of heat energy that raises the temperature of the iron by 25.0°C. If the iron has a specific heat of 0.10 J/g°C, what is the mass of the iron sample?
22 g
20 g
25 g
30 g
Determine the energy (in J) required to raise the temperature of 100.0 g of water from 20.0 C to 85.0 C? The specific heat of water is 4.184 J/g°C
250006 J
37196 J
27196 J
27200 J
Refer the the following question:
2N2 + 3H2 --> 2NH3 + 46 kJ
How much energy would be produced if only 1 mol of nitrogen was reacted?
92 kJ
23 KJ
22 KJ
43 KJ
True or False, The Law of Conservation of Energy states that energy cannot be created nor destroyed only transferred.
True
False
What mass of P4 must be reacted to produce 5905 kJ of energy?
P4 + 6Cl2 --> 4PCl3 + 2439 kJ
323g
783g
300g
231g
What kind of reaction is this?
Exothermic
Endothermic
Ectothermic
None of these
Chemical reactions that absorb heat energy are called __________ and have a __________ enthalpy.
Exothermic, positive
Exothermic, negative
Endothermic, negative
Endothermic, positive
The study of heat energy that is involved in chemical and physical changes is _______.
Efficiency
Thermodynamics
Equilibrium
Energy transfer
