Classify the following as a physical change or chemical change. Column A
1.
Chopping wood:
Chopping wood
2.
Burning Wood:
Burning Wood
3.
Ice cube melting:
Ice cube melting
4.
Steam from a shower:
Steam from a shower
5.
A bike rusting:
A bike rusting
Column B
a. Physical Change
b. Chemical Change

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Explain what will happen if decomposers were apsent from a forest ecoysystem.