6. When ideal work is negative, so this work is the a) Maximum work obtained b) No need for work c) Minimum work required d) No work produced 7. Solidwold is melted under certain conditions. The best required to liquified gold is a) Sensible heat b) Hest of reaction c) Heat of combustion d) Latent beat 8. Heat capacity may change with a) Volume b) pressure c) temperature d) weight 9. The value of liquid water product is called: a) Lower heat of combustion b) Heat of combustion c) Higher heat of combustion d) Heat of reaction 10. Which one of the following is correct? 2) Critical point is defined as the point at which the saturated liquid and saturated vapor states are identical. b) Critical point, is defined as the point at which the saturated liquid and saturated vapor states are non-identical c) Critical point, is defined as the point at which the saturated liquid and superheated vapor states are identical, d) Critical point, is defined as the point at which the saturated liquid and Saturated vapor states are different