What mass of water is required to absorb 4.7 x 10^5 of energy from a car engine while the temperature was initially 25 what will be the new temperature

The mass of water required is, m = 1.492 Kg

The final temperature of water, = 100 °C

Explanation:

Given that

Energy absorbed by water, q = 4.5 x 10⁵ J

The initial temperature of water = 25 °C

The mass of water required to absorb the energy, m = ?

The final temperature of water, = ?

The formula for energy absorbed by the water,  

                                   q = m C ΔT   Joules

where,  

                                   C - specific heat capacity (4200 J/Kg °C)

                                    ΔT = - (change in temperature)

The maximum possible temperature of the water at Standard Temperature and Pressure is 100 °C

As the final temperature is not given, let us consider the maximum possible temperature of the water.

Therefore,  

                                    ΔT = -

                                           = 100 -25

                                           = 75 °C

To find the mass of water, from the above relation

                                        m = q/CΔT        Kg

Substituting the values in the above equation

                                        m = 4.5 x 10⁵/4200 x 75

                                        m = 1.492 Kg

Hence, the mass of water required is m = 1.492 Kg

continuous conducting path for current, power supply

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.