Heat Tranfer

What is the direction of heat flow from a coffee to ice?

• heat flows from ice to coffee

• cold flows from ice to coffee

• heat flows from coffee to ice

• cold flows from coffee to ice

Object A is 25 degrees Celsius and mixes with object B that is 15 degrees Celsius, what is the direction of heat flow?

• heat flows from B to A

• cold flows from B to A

• heat flows from A to B

• cold flows from A to B

If hot food is placed in a fridge, and the food is the system and fridge is the surroundings, what type of reaction is this?

• endothermic

• exothermic

The following TEMPERATURE graph represents an....

• endothermic reaction

• exothermic reaction

Does the following TEMPERATURE graph represent an endothermic or exothermic reaction?

• endo

• exo

This energy diagram represents an....

• endothermic reaction

• exothermic reaction

This reaction would have...

• negative enthalpy and release heat

• positive enthalpy and release heat

• negative enthalpy and absorb heat

• positive enthalpy and absorb heat

Which correctly describes an accurate transfer of heat?

• marshmellow to hot cocoa

• ice to water

• oven to cake

• ice cream to tongue

Which correctly describes the reaction that caused this temperature graph?

• the system released heat

• the system absorbed heat

Chemical A at 8 degrees Celsius is mixed into chemical B at 4 degrees Celsius. If chemical B is the surroundings, this is an...

• exothermic reaction

• endothermic reaction