PHYSICS SS 2

These are the effects of heat except    

• Heat increases in temperature

• Heat expands a substance

• Heat changes the state

•  Heat brings chain reaction

The lower and upper fixed point for the Celsius scales are   

• 0 and 272

• 0 and 373

• 10 and 100

• 0 and 100

There are how many types of scales in current use  

• 1

• 2

• 3

• 4

Which is not correct as part of the types of thermometer    

• Gas thermometer

• Plastic Thermometer   

• Resistance thermometer 

• Thermoelectric thermometer.

The heat capacity measures the amount of heat necessary to raise the temperature of an object or system by ____ degree celsius    

• one

• hundred 

• ninety

• one thousand

Heat capacity is measured in ____ 

• kelvin per joules

• joules per kelvin

• joules

• kelvin

The formula for specific heat capacity can be written as  

The specific heat value for aluminium in J/Kg is   

• 800

• 900

• 980

• 450

The heat capacity of most system is not a constant. Rather, it depends on the state variables of the thermodynamic system under study. In particular, it is dependent on    

• Temperature only

• pressure and temperature

• volume and pressure  

• Temperature, volume and pressure

Calculate the amount of heat needed to increase the temperature of 250g of water from 20 to 46    

• 47 KJ

• 38 KJ

• 23 KJ

• 75 KJ