Question

A 2-kg sample of a metal increases in temperature by 20°C when heated on a stove for 3 minutes. Can you predict what will happens to the temperature rise of a 4-kg sample of the same material when heat on the same stove for 6 minutes. A) The temperature change will be approximately 5°C.

B) The temperature change will be approximately 80°C
Eliminate

C) The temperature change will be approximately 20°C.


D) The temperature change will be approximately 40°C.

Answer 1

C The temperature change will be approximately 20°C.

Step-by-step explanation:

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Answer 2

Answer: C) The temperature change will be approximately 20°C.

Step-by-step explanation:

`Q= m* c* \Delta T`

Q= heat gained

m= mass of the substance = 2 kg

c = heat capacity = c J/g ° C

`\Delta T={\text{Change in temperature}}=20^0C`

`Q=2g* cJ/g^oC*20^oC`

Q=40c Joules

That is in 3 minutes, heat absorbed = 40 c joules

in 6 minutes, heat absorbed=
`(40c)/(3)* 6=80c`

Now as the substance is same, the heat capacity will be same.

`80c= 4* c* \Delta T`

`\Delta T=(80c)/(4c)=20^0C`