QUANTITY OF HEAT REVISION

Front

Define heat

Back

form of energy that is transferred from a body at high temperature to a body at low temperature

Front

Factors affecting the rate of evaporation: temperature, surface area, draught, humidity. Which one does not affect it?

Back

temperature

Front

The quantity of heat required to change a material from solid to liquid without change in temperature is called

Back

latent heat of fusion

Front

0.1kg of dry ice at 0⁰C is melted in a 0.5kg of water at 20⁰C in a calorimeter of mass 0.25kg. if the final temperature of the mixture is 10⁰C, how much heat was lost by the water? take C_w=4200J/Kg/K

Back

21000 J

Front

What quantity of heat is required to raise the temperature of 450 grams of water from 15°C to 85°C? The specific heat capacity of water is 4.18 J/g/°C.

Back

141300 J

Front

The quantity of heat required to change a unit mass of a substance from solid to liquid without change in temperature is called

Back

specific Latent Heat of fusion

Front

Factors affecting boiling and melting points: pressure, impurities, temperature. Which does not affect them?

Back

temperature

Front

An electric heater supplied a current of 2.0A to raise the temperature of 2kg of water by 8⁰C after 15 minutes. If the voltmeter reading was 24V, calculate the electrical heat energy supplied.

Back

43200 J

Front

temperature

Back

A degree of the hotness or coldness of an object or substance with reference to a standard value

Front

A block of mass 2.5kg is heated from 30⁰C to 55⁰C in 10 minutes by an electric heater rated 45W. Find the heat capacity of the block?

Back

1080J/K